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Removal of residual phosphate from DOM steel tubes
I am interested in knowing a popular method for removing phosphate residue of the order of 1 to 2 g/sq.m from DOM steel tubes.The solution should also have anti rust ingredients and be able to do the job in under 5 minutes.Ambient temperature 30 to 35 C is preferable operating temperature.
Tube Manufacturer - Chennai, Tamil Nadu, India
You can use the following solution for removing phosphate coating on steel tubes:
1 liter of Conc. HCl + 20 g of antimony trioxide at room temperature.
This solution in effective in removing the phosphate coating within 1-2 min. It will have only a minimal attack on the base metal.
T.S.N. Sankara Narayanan
- Chennai, Tamilnadu, India
(ed.note Nov. 2017: The good doctor has a fascinating blog at https://advancementinscience.wordpress.com)