Galvanic corrosion is an electrochemical process in which one metal corrodes when it is in electrical contact with another metal in the presence of an electrolyte (such as salt water). One metal (Aluminum) acts as the anode and corrodes, while the other metal (Steel) acts as the cathode and remains protected. When these metals are in contact, and there's an electrolyte present, the aluminum corrodes at an accelerated rate while the steel remains relatively unaffected. We recommend keeping dissimilar metals from direct contact with each other by using insulating materials or coatings. Let us know if you need any further assistance!

@@ShortRunPro Many thanks for the update. In my application there is no obvious electrolyte present e.g. salt water. However, I have since done some research and it seems that even the moisture in the air can act as a weak electrolyte. Again, much appreciate the additional information and the offer of assistance.

no because it’s galvanize is to have the same effect as stainless steel

Hello Sud! This is filmed with a stainless pan with grime build-up at the bottom of the pan. Galvanized material that is outdoors will hold out for a good while depending on the environment (not so much on coastal properties). In our experience, the galvanized coating will last for a few years until it begins to have localized rusting in areas where the galvanized material was cut or bent. We suggest brushing off and cleaning the rust then following up with a galvanized paint or coating to cover up the raw steel.

@@ShortRunPro Good looking out! Its surprisingly odd that the paint is the only way although I understand you cant electroplate the roof again while its on.

@@sudbuddiesexteriordetailin9843 did you ever find Outlook how to Takeshi the rust off it if hit it with sh?

@@gokuamaya No. I havent had it happen yet, so didnt look into it further other than sanding and repainting. I will ruin a test piece of galvanized metal and see what works best. I wanna try oxalic acid...

D's nuts

Price

Never. You must endure the cheap sonic wallpaper.

The zinc plating is less reactive than raw steel and is therefore less likely to react with the aluminum. In moderately humid conditions it is likely that little to know incremental corrosion will occur. In high humidity conditions the use of an electrical isolating between the materials is recommended.

@@ShortRunPro what about on a set of car aluminum heads?

@@sambo92 We are by no means experts on the use of fasteners in an automotive application. However, researching the internet we find that stainless steel fasteners are often used with aluminum in these applications. There also appears to be fasteners that have a specialized zinc and aluminum fleck coating that is corrosion resistant in these applications.

said at 0.53 BAR KEEPERS FRIEND product

Pem

hello sir.

Doug - PennEngineering® has a TechSupport e-mail distribution that will reply to technical questions within 24 hours, Monday through Friday. [email protected] Please forward your questions, we would love to help.