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  for Metal Finishing since 1989
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Chemical etching electrolyte

What is the chemical analysis of the electrolyte used for printing on Stainless Steel DIN no 17443 material no. 1.4441 and DIN 17440 for instruments (using chemical etching process)which should conduct electrical current and could it be from natural salts please advise.

Best regards,

Mr. Khaled Galal Omar
Surgical implants manufacturer - Cairo, Egypt
2004

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There is chemical etching and there is electrochemical etching. Chemical etching of stainless steel is difficult and requires the strongest combination of several harsh and highly toxic acids. Electrochemical etch is much safer. Diluted muriatic acid ⇦this on eBay or Amazon [affil links] (10%) which can be purchased at a nearby store will do. Cathodes (reverse current)can be made of commercial stainless or graphite, at 6V and room temp. Basic precautions as good ventilation to avoid breathing the Chlorine gas.

Guillermo Marrufo
Monterrey, NL, Mexico
2004