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Health risks of smoking near nickel plating solutions
Quickstart:
Although the opening question concerns the health risks of nickel plating, a lot of nickel plating is followed by chrome plating; and all decorative chrome plating requires nickel plating, so chrome plating is included in the discussion.
Intro to Chrome Plating
Q. So this is just a curiosity question, since I'm not a smoker myself but my colleague was an operator of the machinery that transports racks from bath to bath. He was always smoking without going out of the hall where all the plating takes place, and I was wondering what potential health risks and/or hazards it carries apart from what comes from cigarettes themselves? The hall is well ventilated, i always wore a N95 mask but no one else did. People who worked in other parts of the factory, when coming through plating hall, always complained about smell and bleeding of the nose or coughing. My colleague didn't want to obey safety protocols and company didn't care that much, but i was always curious what potential hazards smoking in such place could bring.
Otto SakovichChemical Technologist - Nysa, Poland
July 28, 2025
A. Hi Otto,
To the best of my knowledge, nickel plating is not reported to lead to bloody noses, although chrome plating can.
Most chrome plating involves vats of chromic acid (hexavalent chrome), which most countries consider carcinogenic. Chrome plating is exceptionally low in efficiency
⇦ huh?, with at least 75% of the applied electricity creating hydrogen bubbles instead of depositing chrome. These bubbles cause a ginger ale or champagne effect, entraining chromic acid into the workspace and the environment. Fume suppressants and excellent ventilation are critical control measures.
Back to nickel plating, it is way more efficient than chrome plating, releasing far less hydrogen bubbles. Most of the "mist" one sees from a nickel tank is simply steam rather than anything noxious, but that does not mean it is absolutely harmless, just far less dangerous than chromic acid. These days it is probably appropriate to equip nickel plating tanks with local exhaust ventilation.
Tobacco includes nickel, but a good number of smokers who work with nickel, especially in Canada's major nickel refineries, have acquired cancer, so it has been the subject of several studies, an abstract of one of them is here ⇨
Luck & Regards,
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
(Ted is also available for instant or long
term paid consultation and assistance)
Yes, after nickel plating, chrome was plated as well, however it was trivalent chrome, which I know is much less harmful than hexavalent. We also had baths with solutions for hexavalent chromium plating which were not in use anymore.
What I also noticed is that air seemed to be very acidic in that hall, when leaving ph papers for a night, they showed very acidic ph, and many objects had droplets of yellow oily substance on the bottom, which I assume was hydrochloric acid.
Chemical technologist - Nysa, Poland
July 28, 2025
A. Hi.
Hydrochloric acid is almost always incorporated in plating as a rust-remover and activating solution before the plating step, and the environment in plating shops is often acidic. The smell you encounter seems far more likely to be from the hydrochloric acid dip step than from nickel plating, although it too has a smell.
Hopefully that yellow oily stuff is indeed acid and oil, but it might be chromic acid from your previous hexavalent chrome plating days.
Luck & Regards,
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
(Ted is also available for instant or long
term paid consultation and assistance)
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