A corrosion control test was conducted on alloy steel. using polymeric coatings (polyurethane. bitumen (medium airing). and high-density polyethylene) in dilute HCl solutions of pH values 4. https://www.bekindtopets.com/top-super-H-S-Motorsports-122011-Intercooler-Pipe-Upgrade-Kit-2011-2016-Ford-6-7-Powerstroke-hot-value/