gary curtis
Member
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- 159
The phosphoric acid is a secondary rust remover. Used after electrolysis to clean the steel. By clean, I mean surgically clean. No acid residues that will bring back the rust. Remember, that one of the worst aftereffects of the original rust is the microscopic pitting of the steel. A perfect hideout of acids and crud that will later cause more rust.
So you need a super-cleaning step. To clean out the etching rust causes. Then you might need to sand or polish the steel to eliminate any vestige of pitting. On a saw this can't be done on the teeth.
Phophoric acid is used as a prep for gun bluing because of the pristine state it leaves on the metal surface. The bluing treatment must start with clean, shiny metal.
Bob Smalser explained all this in detail on the WKtools website. The photos he took were very instructive of the whole process.
Gary
So you need a super-cleaning step. To clean out the etching rust causes. Then you might need to sand or polish the steel to eliminate any vestige of pitting. On a saw this can't be done on the teeth.
Phophoric acid is used as a prep for gun bluing because of the pristine state it leaves on the metal surface. The bluing treatment must start with clean, shiny metal.
Bob Smalser explained all this in detail on the WKtools website. The photos he took were very instructive of the whole process.
Gary