Serious Education & the most FUN
you can have in metal finishing
No popups, spam, registration or passwords
on this site FORUM
Electrical switch black carbon buildup on brass material
I have a electrical switch that is showing signs of black carbon build up. The base material is a C260 brass with NO coating. The switch applies only about 1.5N of force and has had a history of failing. Under a microscope the black carbon builds up under the switch and a open circuit condition happens. Any suggestions on a fix or plating to stop this problem?
GHSP - Grand Haven, Michigan
What is the source of the carbon? I suspect the black crud may, in fact, be copper oxide formed by heat from a hot spark. My suggestion: plate the contacts with ruthenium, or if the contact does not abrade the surfaces (no sliding wear) you might be able to get away with gold or palladium.
Surface Conversion Sciences - Bellefonte, Pennsylvania, USA
If you have a question in mind which seems off topic, please Search the Site
Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.
If you need a product/service, please check these Directories:
JobshopsCapital Equip. & Install'nChemicals & Consumables
Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices
How Google uses data when you visit this site.