Product Application

Transparent, colourless or yellowish corrosive liquid. A strong oxidizing agent that will attack allmost all metals.

Hazard: Dangerous fire risk in contact with orgenic materials. Highly toxic by inhalation, corrosive to the skin and mucous membrance. Uses : Orgenc synthesis (dyes, drugs,explosives, cellulose nitrate, nitrate salts ), photoengraving, etching steel. 

Passivation Treatments

• Grades with at least 16% chromium (except free machining grade such as 303):

20-50% nitric acid, at room temperature to 40oC for 30-60 minutes.

• Grades with less than 16% chromium (except free machining grades such as 416):

20-50% nitric acid, at room temperature to 40oC for 60 minutes.

• Free machining grades such as 303, 416 and 430F:

20-50% nitric acid + 2-6% sodium dichromate, at room temperature to 50oC for 25 40 minutes
 

Pickling Treatments

• All stainless steels (except free machining grades):

8-11% sulphuric acid, at 65 to 80oC for 5-45 minutes.

• Grades with at least 16% chromium (except free machining grades):

15-25% nitric acid + 1-8% hydrofluoric acid, at 20 to 60oC for 5-30 minutes.

• Free machining grades and grades with less than 16% chromium such as 303, 410 and 416: 10-15% nitric acid + 0.5-1.5% hydrofluoric acid, at 20 to 60oC for 5-30 minutes.