发明名称 |
Method of detecting carbides in alloy steels by electrochemical polarization |
摘要 |
An electrolyte such as a saturated picric acid solution in a cell for measuring electrochemical polarization is placed in contact with an alloy steel such as a CrMoV steel which has been subjected to a high-temperature and stress-applied condition, and a potential is swept between the CrMoV steel and a salt bridge in the cell, whereby the Mo-rich carbide M6C undergoes a dissolution reaction at a potential near a specified value and this reaction is visible as the secondary anode peak current, or the second appearance of peak current on the waveform of electric polarization. Since the secondary anode peak current is closely related to the amount of M6C precipitation, the progress of degradation in the CrMoV steel can be evaluated by a simple method with good precision.
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申请公布号 |
US5505827(A) |
申请公布日期 |
1996.04.09 |
申请号 |
US19930155873 |
申请日期 |
1993.11.23 |
申请人 |
FUJI ELECTRIC CO., LTD.;TOHOKU ELECTRIC POWER CO., INC. |
发明人 |
YAMASHITA, MITSUO;KATO, NOBUO;SAKUMA, NAOKATSU;WATANABE, TERUTSUGU |
分类号 |
G01N17/00;G01N27/26;G01N27/416;G01N27/42;G01N27/48;G01N33/20;(IPC1-7):G01N27/26 |
主分类号 |
G01N17/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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