LITTLE KNOWN FACTS ABOUT SMALL CHROME LETTER.

[18] Passivation is often enhanced by small contact with oxidizing acids like nitric acid. Passivated chromium is steady against acids. Passivation could be taken out with a solid lessening agent that destroys the protecting oxide layer within the steel. Chromium metallic treated in this way conveniently dissolves in weak acids.[19]It can be done t