Superficial corrosion on aluminum engine blocks - Mercedes-Benz Forum
 
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post #1 of 2 (permalink) Old 06-20-2019, 05:51 AM Thread Starter
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Lightbulb Superficial corrosion on aluminum engine blocks

Has anyone found a good treatment to eliminate / prevent the filiform corrosion on aluminum engines that won't damage alternators, belts, etc? Thanks.
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post #2 of 2 (permalink) Old 06-20-2019, 10:31 AM
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From this page: https://www.pfonline.com/articles/ho...aluminum-alloy

"The damage is not extensive to the aluminum but is cosmetically objectionable, especially when the track is long and white in color."

"This type of filiform corrosion can damage all types of aluminum products such as wheels, automobile bodies and aircrafts. To repair the effect requires sanding and the application of a new layer of coating. To prevent filiform corrosion, proper surface pretreatment is required."

"The most important factor for the coating is to have very strong adhesion to the substrate to prevent the corrosion from starting."
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