Posted by Dave G9N on August 30, 2023 at 11:55:37 from (24.220.196.59):
In Reply to: Diesel fuel question posted by super99 on August 30, 2023 at 04:56:43:
Quote: CVPost-Geo-TH,In (quoted from post at 07:41:28 08/30/23) What about using brass?
I hadn't heard about diesel and zinc, so I looked it up. Diesel reacts with both copper and zinc. Brass is a copper alloy containing zinc and was on the list of metals to avoid.
The small fitting is not going to do anything in a hurry. The problem is more with storage. A small galvanized fitting as a temporary repair should be OK for a while.
Immersion in a hot caustic solution or room temperature hydrochloric acid will remove the zinc from galvanized steel. The acid does not need to be very strong, so diluting it with water will work well, but a bit slower without the fumes. Zn is generally not resistant to any acid, so citric acid or vinegar will work. Adding some salt to vinegar or citric acid will effectively make a dilute hydrochloric acid, which will strip the Zn faster.
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