The authoritative public forum
  for Metal Finishing 1989-2024
  

  -----

Remove scale from mild steel wire

Sir,

I have a small electro plating unit, I have a problem regarding pickling, during annealing mild steel wire deposits some amount of oxides (scale), normally wire size is 0.80mm, 0.90 mm, 1.00mm, 1.20mm, 1.40mm ,we using 50 percent sulfuric acid solution for washing this scale from wire but it is taking to much time and so much hard smell of acid and some time scale is not completely wash , please tell me any chemical name for better, fast and without smell pickling.

Nadeem Ahmed
standard wire industries - Pakistan
2004

---

2004

Dear Nadeem Ahmed,

You can ues hydrochloric acid in pickling in electroplating line 400g/l at room temperature with some additive it is very better than hot sulfuric acid in remove the iron oxide scales from the steel surface special in electro plating.

Good luck

Aly Gomaa
- Cairo, Egypt

Hi, I'm working in a wire industry, you need to pickle it with HCl acid at about 16% concentration, I dun have any knowledge about electro plating galvanizing but of simple galvanizing process of using flux, and melt zinc at about 450 c, pickle it twice once in a acid tank then on zinc line acid tank.

Talha
- Karachi, Pakistan
2006

Hey again, 1st of all u've to anneal your wire properly, your annealing pot must be airtight because air occurs scale on wire, n in electro plating plant, you must have a de-scaler it'll help you , thanks.

Talha Abdul Rahman
- Pakistan
2006