Metal finishing Q&As since 1989

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Zinc nickel alloy temperature limitations

Hello,

I am a chemical engineering student at the University of Cincinnati and I am interning at a plating shop in Ohio. I am currently trying to introduce the idea of zinc nickel alloy plating to the company. I gave my pitch to sales yesterday and I think it went pretty well. The one question they asked me that I remember reading about but cannot find it again was "What temperatures does zinc nickel protect against?". I know zinc nickel is usually used on engine parts so it is pretty high. I remember reading somewhere that it prevents corrosion anywhere from 250-500 F depending on the nickel content. Can anyone confirm or deny this? Could you also give me the temperature ranges for the different nickel contents, please? I would greatly appreciate this. Thank you.

Kyle Crawford
Student - Dayton, Ohio, USA
November 5, 2010

Corrosion vs temperature is going to depend on what the final coloring /corrosion dip is.

James Watts
- Navarre, Florida
November 5, 2010

Alright. Could you give me some examples of different types of those? Can zinc nickel alloy be used up to 1000 °F? Thank you.

Kyle Crawford
Student at plating shop - Dayton, Ohio, USA
November 24, 2010

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Hello Kyle,

I have tested Zinc Nickel with a clear passivate at 330 °C and it passes a quench test. Most parts around an engine go up to 350 °C and parts in direct contact with the engine block do not actually exceed 380 °C.

Khozem Vahaanwala
Saify Ind

Bengaluru, Karnataka, India

November 24, 2010

Thank you very much Khozem. I appreciate it.

Kyle Crawford
Student - Dayton, Ohio, USA
November 29, 2010