fastening aluminum to mild steel or stainless steel
fastening aluminum to mild steel or stainless steel
(OP)
We have a project where we have some aluminum ducting that will have mild steel support brackets fastened to them with stainless 304 fasteners. Will mild steel facilitate corrosion between these two metals faster than stainless? (The mild steel will be painted with Dupont Imron prior to assembly) What would be a suitable barrier to put between the two dissimilar metals to prevent corrosion?
thanks
thanks





RE: fastening aluminum to mild steel or stainless steel
The APIGUY....
RE: fastening aluminum to mild steel or stainless steel
RE: fastening aluminum to mild steel or stainless steel
Aybee, I'm not sure I understand your statement. "if the stainless is in contact with the aluminium in air then the aluminium will corrode even if the carbon steel is painted" We are looking at either fastening mild steel to the aluminum, or stainless to aluminum, providing it would have corrosion advantages.
thanks
rustang
RE: fastening aluminum to mild steel or stainless steel
Remember: For galvanic corrosion to happen you need two dissimilar metals in the presence of an electrolyte. Eliminate one of these, almost no corrosion happens. If you eliminate the moisture path, chances are you will eliminate the corrosion also.
We use this same combination to insulate pressure vessels quite frequently.
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