Iron Phosphate Removal

I'm just curious. Why would you want to remove the phosphate before painting?

Hammerhead writes:

"My interior oven panels are mild steel that has been phosphate treated. The manufacturer of the oven suggested I powder them with hi temp silver."

Come on! How are you going to do that? P.coat the oven from the inside using a 'frit', a porcelain like substitute. Begs the question how hot IS this oven anyway? Nope.

I find this odd. Being black iron oven panels on the inside of the oven to start with. Iron Phosphated or not. Why didn't the oven mfg finish the job and paint the I.S. of the oven panels? B.R. [Before Rust]

Mild steel or also called black iron panels don't belong inside an oven IMHO.

Every oven I have ever built for a company has been with Ryerson Aluminized sheet steel, both sides, rolled, and tongue and grooved. Usually with 3" or 4" or 6" inches of 4 lb density mineral rock wool for walls and roofs. The floor panels are a wee bit heftier using 6 lb density and 20 ga. Some times I'll pour an insulated cement floor of 4:1; cement and vermiculite and a bit of liquid soap.

Purchase new oven panels, save your money buying high temperature silver paint.

skip.

Last edited by skip (12/11/2009 - 08:06 PM)

Every Organic Acid can remover Iron Phosphate coating .Personally I prefer Phosphoric Acid 10-15% percent concentration.

Note : Iron Phosphate is one of the best metal preperation before Powder Coating paint