Tianjin where can do intergranular corrosion test
Tianjin Rong Da Testing Co., Ltd. contact: Wang Jingfu
Cell phone: 13102238283 QQ:3144667033
Telephone: 022-23892103
The combination of intergranular corrosion and intergranular failure greatly reduces the mechanical strength of the metal. But after the occurrence of surface corrosion of metals and alloys still maintain certain metallic luster, do not see signs of destruction, but the binding force between grains decreased and the deterioration of mechanical properties, can not withstand the strike, so it is a very dangerous corrosion. Usually occurs in brass, aluminium alloy and stainless steel, nickel base alloy.
Metal corrosion test method is designed to test the susceptibility of metallic materials to intergranular corrosion under specific medium. The purpose is to know whether the chemical composition, heat treatment and machining process are reasonable. The principle is to adopt the corrosion potential of metals in the constant test solution potential polarization curve of a specific interval, the use of metal grains and grain boundaries of intergranular corrosion accelerated display significant differences in the potential range of corrosion current. Standard Test methods for intergranular corrosion of stainless steel and aluminum alloys have been standardized in many countries. Each standard has detailed provisions on the details of the test