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Corrosion protection for Maraging steel

Corrosion protection for Maraging steel

Corrosion protection for Maraging steel

(OP)
I am looking for corrosion protection for C300 and C250 maraging steel.  Must pass high humidity, salt water environment.

RE: Corrosion protection for Maraging steel

How about zinc phosphate primer plus cathodic electrocoat?  Or maybe a multilayer organic -e.g. Dacromet, although there are superior products.

RE: Corrosion protection for Maraging steel

What is the operating temperature expected to be?  Any potential for wear?  CoryPad gave some good candidates if ambient temperature is the predominant environment.  I would recommend coatings from Magni instead of Dacromet, but that's mostly personal preference.  

Cadmium coatings (vapor deposition instead of electroplating) are used for a variety of aerospace applications.  If you can provide some additional details, we can help narrow down the candidates.

RE: Corrosion protection for Maraging steel

(OP)
The temperature is 15F to 120F.  The coating should be tough enough to be handled and moved by cradles and carts.  

RE: Corrosion protection for Maraging steel

Depending on the duration of salt spray resistance, it sounds like any of the above would be suitable.  Some rough estimates for corrosion protection in a salt spray/fog environment (ASTM test method B 117) are as follows:

1. zinc phosphate + epoxy electrocoat (25 micron thickness) = 500 to 1000 hours.  Higher film build will give up to 2000 hours.

2. Magni or Dacromet = 500 to 1000 hours, depending on film build and exact formulation.

3. Cadmium (I meant vacuum deposition not vapor) = 96 hours at a typical thickness of 12 microns.

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