Zinc Plating

Zinc Plating Per ASTM-B633: Zinc coatings prevent oxidation of the protected metal by forming a barrier and by acting as a sacrificial anode if this barrier is damaged. Zinc oxide is a fine white dust that (in contrast to iron oxide) does not cause a breakdown of the substrate's surface integrity as it is formed. Indeed the zinc oxide, if undisturbed, can act as a barrier to further oxidation, in a way similar to the protection afforded to aluminum and stainless steels by their oxide layers.

ASTM-B633 or QQ-Z-325
Service Condition IV or Class I- 0.0010 min
Service Condition III or Class II- 0.0005 min
Service Condition II- 0.0003 min
Service Condition I or Class III- 0.0002
Type I- As plated w/o supplementary treatment
Type II- With colored chromate conversion coating
Type III- With clear chromate conversion coating

Zinc Plating Photos