Design, specification, steel chemistry, and fabrication practices all have an influence on the HDG coating appearance. Although appearance does not affect the durability or corrosion resistance of HDG steel, it can impact the intended use of the product.
Antimicrobial compounds can aid in preventing the growth of stain- and odor-causing bacteria and help maintain the integrity of the paint or coating. These types of coatings may be used on a wide range of products in high-traffic commercial and institutional buildings, including architectural aluminum products.
When two different metals are in contact and exposed to moisture containing salts or pollutants, one of the metals can experience accelerated corrosion while the other remains protected. This type of accelerated corrosion between dissimilar metals negatively impacts the overall corrosion protection of the project and is referred to as galvanic corrosion, bi-metallic corrosion, or dissimilar metal corrosion. It can be prevented by utilizing compatible metals and/or favorable surface area ratios, providing barriers to break electrical contact between metals, or isolating the metals from the environment.
The coil and extrusion coatings industry is committed to developing products offering increased corrosion performance and do not contain the Red List materials. While a comprehensive and cost-effective solution remains elusive, the industry is working to resolve these issues.