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"Alternative to acid pickling"
We have a factory making Co2 welding wire , we at present use Sulphuric acid for pickling , however we find that due to negligence of our workers in washing the coils after acid pickling leads to problems in copper coating the wire.
Is there a alternative to acid pickling?.
Or is there a alternative menthod of acid washing.
welding consumables - India
First of two simultaneous responses -- 2005
Mechnical descale for rod for breakdown.Colin Steward
- West Yorkshire, United Kingdom
Second of two simultaneous responses -- 2005
What are the problems?
There are other pickling methods, some more aggressive and others not. e.g., HCl ..
You should be aware that with any chemical used, great care needs to be taken in handling and usage. Neg. is dangerous in a plating shop, but these things happen.
Try using Inhibitors.
This inhibits attck of Acid on the substrate and prevrnt etching.This conditions and activate substrate for further processing.
plating process supplier - Mumbai, India
What kind of inhibitors should I use ?
The major problem is that due to negligence in washing the acid , The acid remains on the wire and the copper coating is not uniform ,due to which the base wire corrodes due to attack of moisture.
- Mumbai, India
While inhibiters help with the attack and the steel while in the pickling bath, try agitating the rinse cycle by air and warm up the solution.
Hello Mr S Prabhudesai;
After pickling and double dunk rinsing, keep your coils in a drum of water containing 20 gms per litre of Sodium Bicarbonate. These drums can be placed under your wire pick up station before the plating tank begins.
The bicarb is mild enough to neutralise and also ensure a good pickup of plating.
Buy me dinnner or buy my plating chemicals after you have solved this problem.
Bengaluru, Karnataka, India