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Tellling Galvanising from Electroplating

How to find out a component whether it is electroplated or galvanized.

Vijay Kumar
ABB - Bangalore, Karnataka, India
2005

2005

Hot dip galvanizing gives a zinc coating from about 2 mils thick to about 10 mils thick (51 microns to 254 microns). Electroplate zinc is normally much thinner perhaps about 0.1 mil (2.5 microns). Thus a simple magnetic thickness gauge can easily determine which zinc coating method is used. Hot dip galvanized steel is suitable for outdoor use.

Regards,

Dr. Thomas H. Cook
Galvanizing Consultant - Hot Springs, South Dakota, USA

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