Black Ziron
Zinc Iron alloy deposit for extended corrosion
resistance and environmental durability
Black Ziron uses proven alkaline, non-cyanide plating chemistry for even plate distribution over a wide range of current density. Many jobs which require expensive internal anodes (if plated in cyanide or acid zinc solutions) can be done without dedicated fixtures saving considerable money.
The benefits of iron addition form a corrosion resistance standpoint are maximized while alloying zinc with a controlled amount of iron resulting in a 0.3 - 0.8 weight percent iron deposit. Black Ziron offers consistent corrosion resistance at least five times better than that of conventional zinc plating in many applications. Alternatively, Anoplate's Ziron alloy coating is offered with a yellow or olive drab chromate.
Black Ziron utilizes a silver-free chromate post-treatment so there is no tendency for the black to fade to green as frequently encountered with conventional black zinc plating.
Zinc Alloy Deposits: Typical Hours to Rust in Salt Spray*
|
Alloy/Chromate
|
White Rust
|
Red Rust
|
|
Black Ziron
|
250
|
800
|
|
Zinc - Cobalt / Black
|
200
|
500
|
|
Zinc - Cobalt / Yellow
|
250
|
500
|
|
Zinc - Tin / Black
|
100
|
500
|
|
Zinc / Yellow
|
100
|
200
|
* Based on ASTM B117 Neutral Salt Spray (5%) Testing at 0.0002 inch thickness
Zinc Iron Alloy Specifications
|
Originator
|
Spec Title
|
Designation
|
|
ASTM
|
Electrodeposited Coatings for Zinc Iron
|
B842
|
|
General Motors
|
Corrosion Protective Zinc Alloy Plating
|
GM 6280M
|
* Black Ziron meets or exceeds the requirements of these speciffications