GB/T 19351-2003 "Metal overlay, determination of gold overlay porosity on metal substrates, nitric acid vapor test", specifies the method of determining the porosity of gold overlay on metal substrates by nitric acid vapor test. The standard specifies the test principle, equipment, operation procedures and result evaluation, and reveals pores through the reaction of nitric acid vapor with the matrix at the pores. It provides a standardized testing method for accurately evaluating the porosity of gold overlay, controlling platings mass and protective performance.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | A29 | ICS | 25.220.20 |
| Release Date | 2003-10-29 00:00:00 | Implementation Date | 2004-05-01 00:00:00 |