Re: Re: rust

Posted by Ol Chief on September 29, 2003 at 22:06:24 from (63.246.186.23):

In Reply to: Re: rust posted by Stan TN on September 29, 2003 at 16:40:10:

In the marine industry (Ospho) tradename is widely used prior to primer paint.This product is a rust converter.I am told by One of their distributers that ospho contains 76 percent Phosphoric acid plus some buffers.This material stops rust by converting iron oxide to iron phosphate.In past on seagoing ships I have seen thousands of gallons of this stuff used over a period of years.White works on ships are very difficult to maintain due to rust stain bleeding thru the paint.If a 50 percent water mix is used it will remove all chalk like deposits along with stainsand provides a skin that prevents further bleeding .Often seen this hold from several days to weeks.I use it on my old tractors just to see where the paint stops and the rust begins.It is for use on surface rust,not heavy scale.However small scaled pieces will be descaled if submerged in the solution for a timebut be careful not to leave parts to long or they may be reduced.I suggest after water rinse, to rinse again in a mild solution of water and baking soda to neutralize any thing left in the pores of the metal.That is not necessary if you are just coating in way of painting large surfaces.I am in Texas and can find Ospho at the hardwear store For $17.00 Per gallon.There are other similar products around.Coroseal is a different type product and hard to find.

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• Re: Re: Re: rust rusty 06:31:40 09/30/03 (0)

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