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What is NH35?

What is NH35, its now being used on thixomolded magnesium before powder coating. Also why is it required.

Dave Burrows
- Colorado Springs, CO, USA
2003

"Magnesium Technology"

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NH35 is a type of chromate conversion coating used for magnesium die castings. It was developed by Norsk Hydro as a pretreatment for subsequent painting. It provides for better adhesion, as well as enhanced corrosion resistance. None of the chrome-free pretreatments (Alodine 5200, etc.) have been able to meet the same corrosion performance that NH35 provides.

Toby Padfield
Automotive module supplier - Michigan
2003

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