Intergranular corrosion and hydrogen embrittlement of sensitized SUS316 steel and Inconel 600
Koterazawa Keiji; Inoue Shozo; Uchida Hitoshi; Kozono Yasushi; Tsurui Takafumi
Abstract:Hydrogen embrittlement and intergranular corrosion of sensitized SUS316 steel and Inconel 600 were studied. Intergranular corrosion susceptibility with the strauss test for SUS316 steel increased with sensitized time and reached a maximum at 973 K, 86.4 ks, then decreased. Intergranular corrosion susceptibility in boiling 40% HNO sub 3 test for Inconel 600 increased with sensitized time and reached a maximum at 973 K, 8.64 ks, then decreased. Hydrogen embrittlement susceptibility with the tensile test under cathodic charging on SUS316 steel increased with formation of Cr depleted zones. On the other hand, hydrogen embrittlement susceptibility with the tensile test under cathodic charging on Inconel 600 increased with formation of Cr carbides. Key Words:stainless steel, Inconel 600, Hydrogen embrittlement, Intergranular corrosion, Cr depleted zone