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"RCA test for electroless nickel"



2005

Somebody tells me that there was a test that permits to distinguish High phosphorus from medium phosphorus electroless nickel. This test names RCA and based on used on nitric acid. Is RCA test is a standard test?

P. LE VASSEUR
SCHNEIDER ELECTRIC - ESPAGNAC, FRANCE
^


2005

The nitric acid test was originally developed by the RCA Labs in New Jersey in the 1960's as a quality control test for incoming electronic components.

The standard nitric acid test is an immersion of a coated coupon or part into concentrated nitric acid (70 percent by weight concentration) for 30 seconds. If the costing turns black or grey during the immersion, it fails the test.

The nitric acid test is actually a test of passivity, but usually high phos coatings pass the test easily, while coatings containing less than 10% phosphorus usually fail in seconds.

Deposit porosity and co-deposited contaminants also effect the results.

The test is not part of any national standard but is used by different companies as part of their purchasing specs.

Ron Duncan
Ron Duncan [dec]
- LaVergne, Tennessee
It is our sad duty to note Ron's passing on Dec. 15, 2006. A brief obituary opens Episode 13 of our Podcast.

^


2007

Somebody tells me that low stress sulfamate nickel(plating type) plate can to pass RCA nitric standard or no?

Don't coat high phos coatings!

CD. Jack
yihshan - Shenzhen, China
^

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