Chemical Resistant Coatings for a Diesel EGR

Why should you coat an EGR with a chemical resistant coating?

At the DECC Company, we pride ourselves in offering solutions to difficult problems. In regards to how diesel manufacturers have decided to meet the demanding Tier 3 and Tier 4 EPA emissions requirements enacted in 2010, we appreciate both schools of thought and recognize the difficulty involved in providing a solution to these new stringent requirements.

Whether you believe solely in an advanced EGR (exhaust gas recirculation) system or a SCR (selective catalytic reduction) system to lower NOx (nitrous oxide) emissions, one thing is certain: the SCR system will still need to utilize an EGR to some extent in order to meet these harsh EPA standards. So, regardless of which method is utilized, both systems will encounter a relatively significant problem: chemical corrosion inside the EGR.

As engine exhaust contains sulfur oxides, nitrate oxides and particulate matter, and the sole purpose of an EGR is to re-circulate this exhaust, the sulfuric acids and nitric acids will ultimately corrode the exhaust system if left unprotected. Typically made of cast iron or aluminum alloys, the corroded particulates can flake or break off and cause damage to not only the exhaust system, but other parts of the engine, leading to overheating of the engine, reduced efficiency and/or increased maintenance costs.

As stated, diesel manufactures made a choice between two different solutions to meet emissions standards, but both will face the issue of chemical corrosion in an EGR to some extent or another. However, DECC can offer a solution to this problem with state-of-the-art chemical corrosion resistant coating applications.

Through the use of corrosion protective coating applications, we have (and continue) to successfully resolve corrosion issues for major diesel OEM’s that are directly caused from acid byproducts generated from modifications necessary for the new EPA standards. Please contact us today to find out how DECC can help with your corrosion issues and keep your diesel engines within EPA regulations while simultaneously reducing unwanted costs.