Galvanic corrosion is not limited to carbon on aluminum. It will happen when any dissimilar metals are in contact with each other. 6061 and 7075 could react.
Salt and some detergents may cause corrosion. But if you haven't used anything then tough to explain.
Maybe wait for the manufacturer could well be a factory fault and you score a new frame.
What started as a small paint chip could have allowed moisture to get under the paint and it started corrosion. Hi pressure wash can force water and detergent under the paint and if not rinsed off can react with the aluminum.
Looks like galvanic corrosion . If it is a carbon frame or seat post then it could be a reaction between the carbon and aluminum. Carbon assembly paste would have limited the effects of the reaction.
Forum posts are not a requirement for posting in the Classifieds. Just take extra care and do your homework. Someone with zero forum posts can have 100 positive 5stars.
Manny now that i see you before i forget. All sorted she collected Sunday was still new in the box so she needs to assemble please double check when you see her that all is in order👌🏻
That graphene black wax is supposed to be very good but never given it a go bit out of my price range. Recommend by Absolute Black Chainring's think is there product.
