What is the authenticity detection method of weathering steel plate?

First: hand it over to a third-party testing agency to test the content of several precious metal elements such as Cu (copper), Ni (nickel) and Cr (chromium) through spectroscopy, and compare it with the reference in the warranty book. Cu and Ni of ordinary steel plates The content of several precious metal elements such as, Cr, etc. will be 10 times or more less than the corresponding content in the weathering steel quality guarantee book.

Second: Sampling and testing the weather-resistant steel plate. Divide the sample into two halves. Use a grinder or sandpaper to destroy the original rust surface, and then perform water spray observation. Because the real weathering steel plate is the excellent material of the steel plate itself, even if one layer is knocked out, a good rust surface will naturally grow inside.