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Bright zinc plating over industrial steel

How long can I expect bright zinc plating to last over industrial steel, if exposed daily to outside elements? And our company only guarantees 48 hours salt spray.

Misty Bruders
- Washington, Iowa

Steel parts that have been properly zinc plated and chromated should give years of service. Yellow chromating (type II) offers better corrosion resistance than clear. A thickness of the zinc plating and conversion coating is essential in order to give a service expectancy of 3-7 years (ASTM B633).

Gary Patigler
- Richmond, California, USA

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