| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.14 ( March 1986 ) Special Issue on Stainless Steels ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Corrosion and Stress Corrosion Behavior of
13 Cr Martensitic Stainless Steels in CO2-H2-S-Cl- Environment Hayao Kurahashi, Yuji Sone, Kayoko Wada, Yoichi Nakai |
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Synopsis : Corrosion and stress corrosion behavior of two types of 13 Cr martensitic stainless steels, C-Cr type (0.2%-13% Cr) and Cr-Ni type (0.02% C-13% Cr-3% Ni), were investigated in CO2 and CO2+H2S environments. The 13 Cr steels were resistant to CO2 corrosion at low partial pressure of CO2. High partial pressure of CO2 (30 atm), however, increases the corrosion rate of 13 Cr steels at above 150. When a small amount of H2S is mixed into CO2 environment, crevice corrosion resistance is greatly decreased. Susceptibility to cracking was measured by the slow strain rate technique in CO2+H2S environment and changes in the corrosion potential were measured during the test. The C-Cr type steel reveals an active state in all these environments and its resistance to cracking is inferior to the low alloy steel used. The Cr-Ni type steel reveals a passive state, but is translated into an active state by straining and resistant to cracking. |
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