Blue liquid for rust prevention

[Suzuki4evr]

Zuki, it's usually phosphoric acid solution, with a bit of chromic acid in the mix to help the controlled oxidation reaction along. If you pre-heat the part (or solution) it will blacken almost instantly. It works well. I don't know if US brand names are of any help in SA, but the product itself is ubiquitous.

Thanks. At least I can try to compair it to some products we do have here. I don't no yet where to look for it,but it is a start.

 

[Suzuki4evr]

The best I have found is oxpho-blue liquid from Brownells - https://www.brownells.com/gunsmith-...ld-bluing-chemicals/oxpho-blue--prod1072.aspx.

This alos looks promising, I will see if I can find it in SA

 

[Suzuki4evr]

W

If you want something cheap and effective, try parkerizing.

Will check this out too. Thanks

 

[f350ca]

I've been using this product for a few years now. The sealer seams to make a huge difference with rust prevention and further blackens the surface. Blackened a bunch of lathe tool holders that get banged around in the chip tray, the surface is still great, the sealer seams to hang on pretty well.
https://www.caswellcanada.ca/black-oxide-kit-with-Caswell-sealant.html

Greg

 

[pacifica]

A rust convertor with a light clearcoat I like this product: https://smile.amazon.com/VHT-SP229-...=UTF8&qid=1546631268&sr=8-3&keywords=vht+rust. The least expensive treatment is Skyco Ospho in a gallon container,about $30.
The best rust preventer is too wipe off tools after use (I like fluid film which is lanolin),especially surfaces touched by hands and store in a dry, covered place. If you haven't used tool for several months they need to be wiped with a rust preventive.