Zinc and 300 series combination
Zinc and 300 series combination
(OP)
Hi all,
I'm not a corrosion engineer, so forgive me if the terminology I use is incorrect. I have a 304 stainless steel stud bar passing through a hole in a galvanised carbon steel plate. I have been advised that to mix 304 ss and galvanised materials is not recommended as the zinc interacts with the chrome in the stainless steel, reducing the strength of the stainless steel. The application is in an air cooled heat exchanger, holding the motor adjusting plate to the bridge frame, the temperature probably will not exceed 40 deg celsius. The top stud bar is under tensile loading and the bottom ones under compressive loading, due to the vertival mounting arrangement. Please supply any advice. Thanks.
I'm not a corrosion engineer, so forgive me if the terminology I use is incorrect. I have a 304 stainless steel stud bar passing through a hole in a galvanised carbon steel plate. I have been advised that to mix 304 ss and galvanised materials is not recommended as the zinc interacts with the chrome in the stainless steel, reducing the strength of the stainless steel. The application is in an air cooled heat exchanger, holding the motor adjusting plate to the bridge frame, the temperature probably will not exceed 40 deg celsius. The top stud bar is under tensile loading and the bottom ones under compressive loading, due to the vertival mounting arrangement. Please supply any advice. Thanks.





RE: Zinc and 300 series combination
RE: Zinc and 300 series combination
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RE: Zinc and 300 series combination
ASM Handbook Vol. 13A, Corrosion: Fundamental, Testing, and Protection p. 390-391 (2003).
Welding and fires can cause catastrophes. SS is preferably passivated after any contact with zinc.
RE: Zinc and 300 series combination