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| RESEARCH OF EPR ON THE SUSCEPTIBILITY TO INTERGRANULAR ATTACK OF AUSTENITIC STAINLESS STEEL |
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| 钢铁研究总院 |
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Abstract The susceptibility to intergranular attack (IGA) of austenitic stainless steel were studied by electrochemical potentiokinetic reactivation(EPR).The influences to IGA under different condition were analyzed,especially,through changing the sensitization time and temperature,scan rate and solution temperature.The results were compared with the result of the oxalic acid etching test.The study shows that the double loop EPR (DL-EPR) method is appropriate for evaluating the susceptibility to IGA.For 304LNSS the longer the sensitization time or the higher the sensitization temperature,the more serious the IGA.The faster the scan rate or the lower the solution temperature,the less the Ra of same material.EPR method is consistent with the oxalic acid etching test.
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Received: 24 August 2006
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