Letter 25020

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 +++ 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 - MI, USA

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