This standard specifies the metallographic method for the detection of contamination layers on the surface of titanium and titanium alloys. This standard applies to the determination of the surface contamination layer (α layer) of titanium and titanium alloy processed products, and the measurement of the thickness of the α layer.
GB/T 23603-2009 history
2009GB/T 23603-2009 Test method of titanium and titanium alloy surface contamination layer