Ask an expert, the product in my hand is cast iron, the surface of the blank needs to be sprayed with black paint, and the salt spray test needs more than 300 hours. - Recipe Complete Network

Ask an expert, the product in my hand is cast iron, the surface of the blank needs to be sprayed with black paint, and the salt spray test needs more than 300 hours.

Iron castings can meet your requirements without phosphating and electrophoresis. You can do this:

After shot blasting, the cleanliness of cast iron reaches Sa2.5 level, the roughness is 50 microns, and there is no oil stain on the surface.

Spray primer (this is very important, and the corrosion resistance after painting depends on it), preferably a primer with good corrosion resistance.

Spray finish

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