It is fairly well known in industry there are limitations to the hot-dip galvanizing process. Due to one such limitation, many parts are machined post galvanizing to meet their intended function (internal nut threads, threads on pipe fittings, etc.). Many manufactures have a lot of experience with zinc electroplated parts but are relatively inexperienced with hot-dip galvanizing. The current language in Note 3 can lead to unrealistic expectation. ASTM A123 has a supporting specification, ASTM A385, to highlight necessary design criteria, but A153 has no such support. While the centrifuge process minimizes the amount of excess zinc on most parts, it is contingent on the parts geometry and this should be highlighted.
Developed by Subcommittee: A05.13
Staff Manager: Kristy Straiton
Date Initiated: 03-11-2022
Technical Contact: Michael McKinnon
Ballot: A05.13 (22-01)
Status: Negative Votes Need Resolution