Topic: cyanide neutralizing after brass plating

Hi all,

Can anyone please tell me how to neutralize cynaide effect after brass plating from base metal iron pipe. I am facing a problem small brown spots occur after few days even after lacquer. It might be cyanide bleed out from small pores which can not be seen by naked eye.

What will be the best way to remove it

- sulphuric acid( in what percentage)

- Citric acid

- 30% of hydrogen peroxide with sulphuric acid

- or any other way which can done in production basis