Letter 31053

Spotting problems on gold plating [Connecticut] 

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My company is an electronics manufacturer. We have a problem with staining on gold plated parts. Base material is brass. Plating is copper then gold.

We have never experienced this problem in the U.S. The problem is in our facility in China. We've had a lab analyze the "spots" (they look like leopard spots) and there is a high concentration of carbon.

Our facility is in an area with high air temperatures and extreme shifts in humidity. We are finding condensation on parts within plastic bags sealed only with staples. The "spots" appear only on the O.D. of parts and not in the I.D.

Nicholas Augelli
Electronics Manufacturer - Naugatuck, CT, USA

Have you checked your gold plt solution , if your gold plated is reddish it means you may have copper contamination, and thickness of your plated gold .

Good luck and GOD BLESS

Cair Shishani
aircraft maintenance - Abu Dhabi, UAE

Try a different bag. I vaguely recall an article, perhaps on this site, that antistatic bags in particular can cause corrosion problems. Or, if "money is no object" a dry Nitrogen fill and heat-seal.

Tom Gallant
- Long Beach, CA, USA

I want to answer or follow-up on this subject publicly (in non-commercial fashion).

 

My company is a supporting advertiser at finishing.com and we want the contact information to reach the inquirer privately.

 

I want to post a new question or inquiry of my own on a different subject.