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Food stains nickel plating

Dear Sir,
Greetings of the day!

I m working as a QA in an export house in India. My problem is "I am facing problems of stains on nickel plated articles when it comes in touch of acids like vinegar, catchup etc. Kindly note that we are not applying any kind of lacquer on the surface. We have tried to avoid this problem by applying 10-12 microns plating but still we are not able to achieve our target.
kindly suggest what should we do keeping in mind that our buyer does not want to apply lacquer on the surface.

thanks & regards,
Ahmed Faraz

Ahmed Faraz
QA - Moradabad, Utter Pradesh, India
2007

Dear Sir,

I am working as QA in a hard goods export company. My problem is that we have been exporting the nickel plated goods for almost 6 months but now our buyer has claimed that there are some stains due to acidic reaction when our product is coming in touch of any acidic substance like catchup, vinegar, etc.

We gave him an option of applying lacquer or any other passivation but he rejected right away.

Is there any solution to avoid stains by adding any additional chemical into our nickel solution? This is for your notice that we are coating about 10-12 microns to rectify this problem, still we are not able to achieve our target.

Kindly suggest what should we do as our image is at stake and we might lose our buyer as well.

Thanks & Regards

Ahmed Faraz
QA - Moradabad, Utter Pradesh, India

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Hello Ahmed,

please allow to give us more informations, which kind of nickel process you are currently using including process parameters, chemical information's, etc.

Thanks.

Regards,

Dominik Michalek
- Mexico City, Mexico
2007