022Cr25Ni7Mo4N双相不锈钢选择性腐蚀行为与两相组织的关系研究
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丰涵,宋志刚,吴晓涵,李惠,郑文杰,朱玉亮
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Relationship Between Selective Corrosion Behavior and Duplex Structure of 022Cr25Ni7Mo4N Duplex Stainless Steel
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Han FENG,Zhigang SONG,Xiaohan WU,Hui LI,Wenjie ZHENG,Yuliang ZHU
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| 表2 两种双相不锈钢经不同电位恒电位极化后残留基体的EDX分析结果 |
| Table 2 EDX results of residual phase of two duplex stainless steels after potentiostatic polarization |
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| Steel | Test position | Cr | Ni | Mo | Fe | PREN | ΔPREN | Residual phase |
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| 022Cr25Ni7Mo4N | Base metal | 25.04 | 6.82 | 3.56 | Bal. | 36.8 | | --- | | Sample 1 at Ehfor 48 h | 26.31 27.22 26.78 | 5.68 5.67 5.28 | 4.55 4.37 4.26 | 59.95 59.87 60.66 | 41.3 41.6 40.8 | 7.1 | α | | Sample 2 at Elfor 48 h | 23.12 | 8.69 | 3.46 | 59.95 | 34.5 | γ | | 23.04 | 8.96 | 2.92 | 59.87 | 32.7 | | 23.36 | 8.35 | 3.57 | 60.66 | 35.1 | | 022Cr22Ni5Mo3N[9] | Base metal | 22.40 | 5.42 | 3.24 | Bal. | 33.1 | | | | Sample 1 at Ehfor 30 min | 24.22 | 7.75 | 5.83 | 59.56 | 43.5 | 11.4 | α | | Sample 2 at Elfor 30 min | 20.48 | 8.07 | 3.53 | 67.16 | 32.1 | γ |
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