Transcript: Using Smart, Sustainable Inhibitors to Stop Corrosion

Dr. Patrick Dodds. Photo courtesy of Hexigone.

Dr. Patrick Dodds, founder and CEO ofHexigone, recently joined our podcast to discuss his company’s high-performance corrosion inhibitors — which were honored in the 2021 MP Corrosion Innovation of the Year Awards

Known as Intelli-ion, Hexigone's range of products replace toxic chemicals with safer, smarter, and sustainable inhibitors that bring coatings to life by enabling them to react and protect “on demand” against corrosion. This is done by incorporating an active ingredient which has never before been used effectively within coatings. 

In the episode, Dodds explains the latest results from the field, as well as the next steps moving forward. See below for a complete transcript.

[introductory comments]

Ben DuBose: Welcome to the podcast. How are you?

Patrick Dodds: Hi, Ben. Thanks for inviting me. Looking forward to this opportunity. We’re really grateful for the award we received from AMPP and talking about our discovery.

BD: Absolutely. We’re glad to talk a little bit more about it. Of course, you’ve been a loyal supporter of MP for years, also now AMPP. I think this will be a good opportunity to explain your perspective for our audience, our longtime and some of our newer members as well, given the merger. I think a good place to start, if you could, just introduce yourself and tell our audience a little bit about your career in the industry, your role with Hexagon, and a little bit out the history of Hexagon as well. It’s a pretty unique story, how you guys were formed.

PD: Absolutely. For me, it really wasn’t, when I started out, thinking I’m going to get a career in corrosion or corrosion technology. I was actually working as a pharmaceutical scientist, making clinical trial material, so I did a lot of milling with dry powders. I decided to back to university. I got paid to do a doctorate, which is great. So I got a salary to go and do my doctorate, and it was sponsored by industry. All the research at the Swansea University is linked to industry, so it’s all very relevant. There’s no kind of what — it’s all solving the problem for industry.

My problem I had to solve was finding a replacement for hexavalent chromate in the coil coating industry. That started in 2011. I did loads of work, four years, end of my doctorate, and suddenly found something that works so well that my student who was working with me, I didn’t believe they’d sent the test off. After a month, I did it, and then my professor didn’t believe me for a month, and then it just kind of all skyrocketed from there because they’d never seen anything performing.

We looked at smart release reservoirs rather than a chemical or different iteration — a lot of the ones you see are phosphates or different polyphosphate iterations like what we did. We looked at smart release vehicles. A reservoir system that locks onto inhibitor systems, and then it releases them on demand. It’s a totally unique concept. Although there was quite a lot of academic work on it, what we did is, instead of writing a paper on it, we put a patent on it, and that’s how we have ended up where we are today.


BD: Tell us a little bit more about your winning innovation. What is it, and generally speaking, how does it work?

PD: As I said, to expand on that smart reservoir system, we used what we term “counterintelligence” to look at characteristics or properties and engineer the material. In this instance, we engineered the system to be affinitive with the inhibitor, lock it in, and then it needs a corrosion trigger to release. This then means that it sits in the coating and only upon an event of corrosion would it release its inhibitor, which is highly effective.

The other part of it is that our product not only increases the life cycle of your asset, so it helps in that way for sustainability. In some instances, we — well, we removed hexavalent chromate, very toxic, from the supply chain. That’s big driver in Europe. It’s actually illegal, apart from some exclusions. Also, then you’ve got your chrome-frees, something like the zinc phosphate. What we’ve enabled our customers to do is obtain better performance than they were getting with 29% of an active. By using our smart release reservoir system, we’ve actually reduced the amount of chemical needed to do the protection down to around 2%.

Another bonus, and they just kept coming and it’s great for us, but we’re working with an adjacent chemical industry, taking their waste stream, and we process that, and then we turn it into our product. We’re dealing with their waste stream, and it means that we get a cheaper raw material to work with, so we can pass that on to our customers as well. It makes us very attractive to the market, not only on the performance but we can compete with some commodity products, like zinc phosphate, by utilizing a lot less. Your cost per liter of paint is a lot less. You’ll get patented technology for cheaper than you’ll get — and higher performance — than you're getting through your commodity product.


BD: How long has this been in the works? If you could, just take us back to the origins of it and the driving forces. I know you touched on this a little bit already, but basically, how this came to be and what the motivations were to develop this. I suppose also the point at which you realized that you guys really had something here.

PD: Take us back to 2015, the end of my doctorate, and we realized at that point that there was something very incredible about this system and how it performed and how it out-performed hexavalent chromate by a long way in the lab tests. But also then we took it into an industrial setting and, once we got the results back from that, we really knew we had something. What really kicked it off? I don't know if we set off on this journey thinking “I’m going have a corrosion inhibitor journey, at the end of the journey.” You don’t — at the time, we didn’t know. We’re very much focused now, but when you’re in the university setting, it’s kind of “what if this or that?” or “who’s going to take this on?”

I think it was from — we won an award from the — they’re called the Armourers and Brasiers’ Livery, and they’re in London now. Very old society. These guys actually go back to when you had armor. This is the livery company of all those companies that were making armor. They carry on now, but on more material science focus. So we won their Material Science Venture Prize, which kicked off forming the company. That was kind of the first step of turning it into a not university discovery but a commercial company, and got us thinking, well, maybe we do have a corrosion inhibiting company. A lot of people told me not to do it along the way. I’m so pigheaded that we just carried on in doing it, and we’re doing it, and actually now we’re producing at the tonnage level, and further, beyond after this year.

It’s one of those things that you don’t expect to set out to do this, and you’ve got a million and one people telling you not to do it, and I think people — you know, sometimes you’ve got to do it, make that step, take that risk and realize that not just having that academic research, you can make a commercial product. Currently I’m employing round about 14 people in around about two years. I couldn't work on the product because I had a conflict because I was working for a very large steel company at the time who were potential customers. So I couldn't work on it fully. So I started in — I won an award from the Royal Academy of Engineering. We’re not award chasers, but we do chase the money, and this is a great one from the Royal Academy of Engineering. They do it every year, quite a few times now. You get a certain chunk of money, so that paid for my salary for a year. You get lots of training for a year, to teach you from being an engineer into a CEO. It was really helpful. Then you get given around about 25,000 pounds to get the company going, as well.

None of it’s equity based, so it’s — you take the awards. The awards come with money. We were just scrapping around. How can we fund this? How can you get this? Money doesn’t just come from nowhere. It’s very hard to get grants, and it’s not so straightforward. We have had a few grants now, but the times we managed to get these. And again, not to name drop, but Royal Society, we managed to get an award through them, funding our first jet mill. That enabled us to micronize our product very quickly and then have a commercially viable, ready product, all ready to go, out onto the market.


BD: When you deal with some of these clients that, I’m sure, have looked in the past at various inhibitor solutions, what are some of the questions that you're having to answer? What’s some of their — I don't know if skepticism is the right word because that sounds a little bit harsh. But I suppose they look at some of their challenges, and they know what you're trying to address, but at the same time there’s these historical limitations. What are some of those questions that you often get when you have a client that wants to know how your solution is going to succeed when others historically have not?

PD: You’ve got a totally unique system. There is obviously nothing like it in the market. I think that helps. I think having 30 years’ worth of research behind us. All our validations are done independently. We’ve got some customers who are kind enough to let us share their data from their coating systems. We’ve got all this backup that, first of all, is scientifically based from the university. They’ve designed machines that can see through coatings, so we can test in 24 hours… I don't know, hundreds of thousands of different iterations of which we would test under different systems and clays, and all these different things in there.

So it’s not just we tried one test and it happened. We’ve got a lot of scientific bases. They’re solid in electrochemistry, it’s an amazing department, and the professors there are incredible and really unique equipment they’ve made in house that other universities buy off them. We’ve got a bit of credibility before we get going. But the test results really speak for themselves. You can’t deny what you see in the images on the corrosion data, especially on steel. It’s loads of red rust or only a little red rust with our product.

This has helped the market. They’d all have to do their own validations. I do have to say it, sometimes you get this reluctance, and you get this “not invented here” syndrome. We’ve experienced this with the larger companies, because generally they’ve got some of their own technology they’ve developed, they’ve got their own expertise center that, you know, worked wherever we come from with this. So you do find more reluctance from these guys there. You might get, “What you got is not any better than what we’re currently using.” Well, we know it is, but there’s reluctance to change. I think that’s one of the biggest things. It’s a really conservative industry; you can’t deny it. In Europe, we would still be using hexavalent chromate, but it was banned by law. They’ve had to change, and that’s just because of legislation. Otherwise, I can’t see it would have changed, really.

But what we are seeing is now it’s kind of a bit of a domino effect, so we’re working in Japan, the U.S., India, and they’ve all gotten pending — banned in India and Japan, they have got this ban coming into force. And I wouldn't be surprised if the USA doesn’t follow suit as well at some point. But we do have a lot of — especially the military — are really trying to move away from hexavalent chromate as well. We can remove — I think there’s not been a product that’s matched the performance of hexavalent chromate. For all its toxicity, it is very highly performing, but it’s so dangerous and it’s caused so much cancer. They want to move away from it. So if we can give people an option of removing that highly toxic compound from their supply chain, we will help them do it.

Subsequently, weirdly, one part about the inhibitor system that we’re using, it is actually taken as a pharmaceutical. So we’re never saying to people, swallow our product, but it’s a hell of a lot safe than something like hexavalent chromate. And we can give you the performance that you would get from hexavalent chromate. In fact, we just did some independent tests matched the performance of hexavalent chromate from two Tier 1 companies, and it was their chromated or chromium 6 products that are on the market today. Someone had independently tested ours against theirs and demonstrated that we had equal or increased performance.

There’s no real reason why, if you’ve got performance, you’re still using that toxic compound. That’s the question that needs to be asked. If you can move away from that, you’ve got the performance, we’ve demonstrated the performance, so why are you continuing to use something that’s really dangerous? On the other side, you’ve got the chrome-frees, as we call them, and they don’t match the performance of hexavalent chromate, so you cannot get to this middle ground of it gives you okay performance. We’re saying, We can give you better performance.

Just for one example. We were working with a customer recently. They would, in their system they’re using 14% of zinc phosphate. I can’t say who it is, and I’m not going to divulge any more information. We don’t know that either. We do know it, but we don’t. We did it kind of from back calculating. That’s a much cheaper product than ours per kilo. But you can use 2% of zinc phosphate and you put 3% of our product in, so we have a synergistic effect as well with phosphate-based systems. So we’re not going in there and saying, “Only use this one product. This is a silver bullet.”

It’s kind of using a combination, look at the characteristics from one and the other one, how they work together, and then you start getting this performance that you're requiring or exceeding your current performance. We work in synergy with that. What we’ve demonstrated is, we’ve reduced the amount of active chemical in that coating system down to 3.2%, but given x in performance, 2000 hours plus of cyclic testing. Will be going out and used on infrastructure by that customer now. And we gave them over 25% saving in that cost associated with the corrosion inhibitor additive that they’re putting into the primer system. It’s kind of like — oh, and the next one we had, this isn’t intentional. It’s kind of like things are all aligning.

We actually reduced the VOC content of that primer system by about a quarter. You go, “well, surely you should be buying this now.” But you have a bit of a conservative industry, so it’s just getting through those barriers and having understanding investors who understand that there’s a very nice market at the end. We’ve just got to get through the conservativeness, demonstrate all these benefits that we would go over, then we get to see the sales increase.


BD: You mentioned the data, which sounds fairly enormous. What type of field testing are we talking about with this? How are you collecting the data? Shed a little bit more light about exactly what it is that you're able to show statistically.

PD: Most of the data we have that we’re allowed to share is from customers who’ve trialed it in their own systems. We’ve only applied a drop-in replacement or a substitute; they would make up it with filler. But we’ve got another advantage that our product has a much lower specific gravity than the other systems. By weight, you get a much bigger volume and actually, because of the reservoir system, you get a solid content added in there because of our product also. It kind of is that we demonstrate these effects. We’ve got the accelerated tests, is mainly one we’re allowed to share. You count salt spray, testing humidity.

There’s a lot of companies who won’t let us share any data because of how we perform with their current system. But we wouldn't ever do that anyway. We respect our NDAs and we expect our NDAs to be respected also. It’s one of those things that we’ve got data in field, outside data as well. Again, that’s not so much that we can share that data. But because we’ve got confidence built from the very electrochemical reaction basis and the performance there, through too the field testing, we know the product works. We wouldn't be doing this if — I wouldn't have started the company from an engineering point of view if I hadn’t had that solid, scientific basis to work off and then move forward. You can’t make up performance. It has to perform. There’s no two ways about it.


BD: What type of feedback have you gotten from users that have actually adopted it? We’ve spent a lot of this podcast talking about the conservative nature of the industry and needing folks to give it a chance. From those that have given it a chance — I know you can’t go into specific results, but just talk a little bit about the types of applications and what it is that they’re seeing.

PD: We’ve had good results from aerospace and protective coatings. That’s our main push because the markets are a bit more responsive than the other markets. We’ve got good results in coil coating. We’ve got some mixed results from coil coating as well, but where the tests haven’t been done correctly. I’m always trying to ensure they’re doing things correctly. I’ve got a big background in coil coating as well, that’s where the doctorate started. What we have is good results from across all those industries, and it’s a significant difference in performance. It’s not small. It’s significant, especially when you’re looking at mild steel protective coatings or galvanized steel. But mild steel especially because the speed at which it deteriorates and then you can see the difference between our product and other products much quicker. That enables people to make that decision a lot quicker. Then there’s a few driver forces in there.

See, it depends who your customer is. We’ve got all these benefits, but for one customer, purely it was based upon saving costs on their raw materials but also getting a better performance at the same time. Other ones, is we can remove the dead fish and dead tree from the paint tins by utilizing our product, so that’s a big boon for them and then their customers as well. The performance is really a driver in the aerospace industry. We’ve compared against things that are 16 times the cost of our products, and we’re being touted as the next best thing to chromate and actually we’ve hugely outperformed them, and you didn’t need to grind us down to a nanoscale. The performance is probably where we start. Then, once you get into the more commercial conversations, cost is always a significant driver for anyone, I think. If we can reduce those costs, especially against something like a zinc phosphate, then it’s insane that we can, we’re 10 pounds a kilo or 15 pounds a kilo or 20 pounds a kilo depending on your grades. Then you’re competing again 3 pounds 57 a kilo, but we can still beat them on cost because you have to use so much less of our material to gain better performance. That’s the main driver versus sustainability and increasing the life cycle of assets, making better paint.

Lots of paint is made every year, and lots of paint is removed and repainted. That’s got a significant amount of drain on the earth’s resources. We’ve just done a piece of work and we actually found it from a piece of Norwegian research that looked into the amount of new steel that’s needed to replace corroded material. It’s something like 40% of all new steel made is done to replace corroded metal or corroded steel. That accounts to 3.2% of the world’s CO2 emissions. If you take, for instance, the aerospace industry, where there’s massive focus on their CO2 output, then they’re only at 2.5%. There’s a whole big thing that we’re missing here that we need to address pretty quickly, and that’s our driver, is to make better performance coatings, less maintenance, less drain on the resources of the world, and utilizing a lot less to do it as well.


BD: What are the next steps as far as the path to commercialization? I know this is already started, so perhaps it’s less about commercialization and more about widespread adoption. Basically, what comes next when it comes to expanding the use and application of this?

PD: What we’ve learned is that the quicker adopters are generally Tier 2, potentially still family-owned businesses. Not necessarily, but potentially. You can talk to a decision maker in there quite quickly, whereas if you're approaching larger companies, it’s a much longer sale. The volumes in the end will obviously be much bigger. But when you’ve got to get through multiple layers and departments and committees. So our focus is really working with our Tier 2 customers — across the globe as well.

This isn’t just in the U.K. We’re working — there’s a lot of work going on in Taiwan at the moment. We’ve got a brilliant distributor working there on our behalf. In Japan as well, we’ve got a great distributor who’s working on our behalf. They’ve all done their own testing before they’ve gone to the market. They’re getting Canada as well, and Europe we’re just getting together with that. We’re utilizing different streams and channels. We’ve done a lot of direct marketing ourselves. We’ve got an amazing marketing manager, called Ella, who is very good at getting our technical articles into the right places so the right audience sees them. It’s kind of a niche product. We’re not trying to look for the bigger market.

But I think Tier 2s is where we’re really focusing on for us as a company, because they’re hungry for market share. By having a differentiated, better primer system, they can get their market share increased. That was really — we — our company wants to help them build their company. A big focus then versus protective coatings because of the speed at which is goes. We’ve got several streams of who we’re working with as the quicker ones to move forward. They’re at the forefront. Then we’ve got the slower burning ones moving along quite nicely in the background as well. Then we’ve got surprise ones that come out of nowhere. We’ve just had an order come in this week from India, and we weren’t even expecting it. It’s kind of one of those, we’re scaling the manufacturing, we’re scaling the team at the moment.

We’ve just taken on a financial director. He’s got 25 years of experience working through places like Akzo Nobel and then Huntsman Pigments, so he’s bringing a wealth of knowledge to that side of everything. Then the other side of it, we’ve got Innovate UK loan from the UK government. Very low rate, to help innovation in the UK, and that’s to pay for our capital equipment to upscale the manufacture to the next step. Beyond that, then we’ve got manufacturing partners and looking at potential partners in regions where the demand is as well. So there’s a lot happening.

BD: Definitely sounds like it.

PD: But it’s all good. It’s all moving in the right direction. We’ve just had a round of investment to help us on that journey as well, because the time you have to wait for the validation, there is a cash burn in that period. When sales start coming in, everything starts to balance out again. But our investors are great. We’ve got some real industry hitters in our investment and amazing experience between them all as well, so really driving us forward on that one as well.


BD: We’re wrapping up here with Dr. Patrick Dodds, CEO and founder of Hexigone Inhibitors, one of the winners our 2021 MP Corrosion Innovation of the Year Awards. As we wind this thing down, one of the things that we do with each of our guests are these rapid-fire questions that are designed to let our audience know a little bit more about each of our guests on a personal level. I think a good place to start with you, Patrick, would be: Who’s someone that you consider a hero or a mentor to you? This can be for you personally or this can be for you out in the industry.

PD: I think, for me, my board is amazing. They’re all mentors to me on different aspects of the company. We’ve got people — like Phil Buck has run his own coatings company. He built up and sold it to Axalta in 2017. He knows the industry inside and out. I’ve got the other team members as well. I’ve got the chair of the board, he helps us on the different aspects of other things. And then our day-to-day team as well. They’re also our mentors as well. I do have a mentor supplied by the Royal Academy of Engineering, Dr. Peter Williams. He’s a CTT… there’s so many people. There’s a lot, and it’s not just one person. It’s a collective of people that I’m on this journey with.

BD: Understandable. Let’s go to the other extreme. What’s something, in a work capacity, that’s a really big pet peeve to you?

PD: My biggest one is not being open and honest. This is one of our core values in the company. Open, honest, there’s no gripes. It’s all open. I think people can put on a face at work, and it’s not really them. Then there’s another side to them. I don’t value that in any way. I think you need to be authentic and yourself in the workplace. For me, if I’m working with people and they’ve got an ulterior motive, that’s a no-no. They need to go. We work as a team, and it’s not about one person. So that for me would be probably the biggest pet peeve I would have.

BD: You mentioned earlier your university background. What’s something that you would say to someone that’s fresh out of school, a newcomer to the industry? What advice would you give to someone that’s just starting out on this journey?

PD: On an entrepreneurial journey, I would say it’s hard work but it’s worth it. In the industry, it’s massive. I don't think you quite realize — I didn’t know, before I went back to do my doctorate, it wasn’t even on my radar, materials engineering or corrosion and the coatings industry. But once we’re in it now, the realization of the global industry, the global nature of the industry, it’s significant and also quite exciting and interesting and the opportunities are huge.


BD: As we conclude this, for anyone that’s listening that wants more information about you, about Hexigone, the technology, where can they find it? Basically, this is your spot where you can plug any resources that you all have for our audience, and where people can get that information.

PD: Absolutely. Go to our website, That’s got all our information on there, contacts you’ll need, our sales and commercial director. There’s, as well, to send emails to. The team’s more than willing, helpful, and we always get back to people. No one’s ever left without a response.

[closing statements]