Letter 24065

Standard salt spray hours for zinc plating (on carbon steel) [New York] 

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Is there a standard on how many salt spray hours before red rust. I am looking particulary for Zinc Plate .0004-.0006" Plus Yellow Chromate per ASTM B-633 [link is to spec at TechStreet] TY2, SC3, PlusMcDermid JS 500 Ultraseal. Zinc Plate 5 Micrometers Min, Yellow Chromate per ASTM B633, TY II, SC. 1. And, Zinc Plate 5 Micrometers Min, Bright Chromate per ASTM B633, TY III, SC. 1

Pat Donlon
a plating shop - Rochester, NY, US

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