In this standard, hydrogen embrittlement of copper is analyzed by (A) microscopic analysis, (B) heating copper samples in a 10% hydrogen atmosphere for 20-40 minutes at 850 degrees Celsius, and (C) practice B with a cold bent after thermal hydrogen treatment. The sample microstructure is analyzed for the presence of voids and open grain structure that is characteristic of hydrogen embrittlement.
Selecting the Right Method for ASTM B577 Testing:
The B577 test methods are used for determining the presence of cuprous oxide (CuO2) in oxygen-free and deoxidized copper.
B577 Method A is a screening test that uses polarized light analysis to analyze mounted samples, and applies to most of the C10000 type alloys, including C11700 and C12000.
B577 Method B is similar but includes a thermal treatment in a hydrogen environment. It applies to the C10100, C10200, C10400, C10500, C10700, C10800, C11700, C12000, C12200, and C14200 alloys.
B577 Method C includes a cold bend test after the thermal treatment. If cracks form on the outer surface, that’s a very clear indication of hydrogen embrittlement.
If you’re not sure which method you need, contact us and we can help you choose. We look forward to helping you!