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"Effect of scratch width in salts spray test on painted galvanized steel"



 

I wonder what the influence is of the scratch width on painted galvanized steel in an accelerated corrosion test according ASTM ASTM B117 [affil. link to spec at Techstreet] . I cannot find any reference in the norm for the scratch. Does anybody have some experience with this?

Another question I have is the difference in corrosion results between painted galvanized steel (±100 %Zn) and painted galfan (±95%Zn/5%Al)

Peter Piessens
- Bertem, Belgium
^


Hi, Peter. I have never heard of a standard scribe width myself, but I see you that you asked this question again as letter 19123 and got some interesting comments.

The proponents of Galfan® claim that improved corrosion resistance is one of its advantages. You might ask them for specific tests results. Good luck.

Regards,

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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