Re: Re: Re: [CR]WWII blackened parts

(Example: Framebuilding)

From: <TW406@aol.com>
Date: Mon, 11 Dec 2000 11:44:17 EST
Subject: Re: Re: Re: [CR]WWII blackened parts
To: Classicrendezvous@bikelist.org


Mr Mountain is right. Thats what I get for just looking at the pictures instead of reading the text! Couple xeroxes going out to the people who asked.

Industrial "Parkerizing" is not an oil bath, but rather an acid treatment...

a phosphate coating.

The surface of the steel is converted into an insoluble crystalline

phosphate, processed with a dilute acid phosphate solution. This achieves a

fairly corrosion-resistant coating, between 0.00015 and 0.0003 inches deep.