| Acid Protection
A test to see how corrosion resistance to acids was done on aluminum using HPC's S04G. It is an extremely durable coating with outstanding chemical resistance. It was successfully tested and proven to eliminate exfoliation/corrosion on aluminum that is subjected to acids, elevated temperatures and condensation/moisture.
The coatings unique ability to exhibit these properties has allowed its application on many OEM diesel EGR components. Another unique benefit of the coating is its resistance to thermal shock, abrasion and water swell.
The coating has outstanding post formability and may be used on flange surfaces without effecting the proper seal of the components. Variation in thickness have shown not to effect the corrosion barrier of the coating.
A minimum thickness is required to protect the substrate metal. Testing procedures to simulate actual conditions/environments that are encountered, HPC tested by the following means: Subject the component to 24 hours of constant acid drip. Samples are to then be micro-sectioned and inspected for integrity of coating. • No exposed substrate shall be accepted.
The HPC coated with S04G and the competitive coating were then micro-photographed (micrographed) after a 24 hour testing period. Failure was based upon whether or not the acid ate through the coating and exposed the aluminum. S04G was successful in keeping the acid out while the competitions failure was evident even before the micrograph was taken.
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