Then there is Chromite a yellowish finish often used on Al. The chrome
attaches to the iron. It is then plated over or painted over.

Martin

On 8/23/2018 7:05 PM, wrote:
On Thursday, August 23, 2018 at 6:07:53 PM UTC-4, Steve W. wrote:
unk wrote:
this car frame need some sections re-constructed due to rust, and enough
other work that everything comes off the frame is an actual frame, has
plastic body

has anyone ever galvanized a car frame - what prep is needed beside basic
oil/dirt/paint removal

it could be electrolytically de-rusted (tank made from large poly sheet
and wood frame on concrete floor), or will the galvanizing process handle
leftover surface rust?

only a few of these car frames made, buying another means basically
buying another car

Didn't do it myself but I have seen one done. For cleaning a good
washing with Dawn/water and rinsing to remove oil/grease. Then derusted
in electolytic bath. The hardest part was finding a plant that still did
hot dip and could fit a frame in the tank. Don't forget you need to plug
any threaded holes and be sure the frame is square and unbent.

--
Steve W.

Hot dipped is not the only way to go. Do not know how to find some one that does this, but there are people that galvanize some what larger thing such as bridges. they use a machine which feeds two zinc electrodes with essentially two MIG power supplies vaporizing the wires and depositing the zinc or the piece being galvanized.

Dan