CAJ | 학술논문

为了研究采用ERNiCrMo-3焊丝焊接F65/316L与X65/Inconel625复合管焊接接头在特殊油气田气体中的耐腐蚀性能，参照ASTM G39、ASTM 71和 DNV-OS-F101标准对复合管焊接接头进行了CO2应力腐蚀试验、高温高压CO2腐蚀、电偶腐蚀性能测试，考察了腐蚀试样表面形貌和成分。结果表明，复合管焊接接头经四点弯曲抗CO2应力腐蚀在母材和焊缝处均未出现裂纹，腐蚀速率满足标准要求；高温高压CO2腐蚀速率为0．002 mm/a，腐蚀类型为均匀腐蚀，腐蚀程度为轻度腐蚀；在3．5％NaCl溶液环境中，电偶腐蚀试验结果表明，焊缝的失重率大于316L和Inconel625母材，其耐蚀性与母材相当。
위료연구채용ERNiCrMo-3한사한접F65/316L여X65/Inconel625복합관한접접두재특수유기전기체중적내부식성능，삼조ASTM G39、ASTM 71화 DNV-OS-F101표준대복합관한접접두진행료CO2응력부식시험、고온고압CO2부식、전우부식성능측시，고찰료부식시양표면형모화성분。결과표명，복합관한접접두경사점만곡항CO2응력부식재모재화한봉처균미출현렬문，부식속솔만족표준요구；고온고압CO2부식속솔위0．002 mm/a，부식류형위균균부식，부식정도위경도부식；재3．5％NaCl용액배경중，전우부식시험결과표명，한봉적실중솔대우316L화Inconel625모재，기내식성여모재상당。
Corrosion behavior of the welded joints of F 65/316L and X65/Inconel625 clad pipes which were welded with ERNi-CrMo-3 filler metal, were studied in this paper .According to ASTM G39, ASTM 71 and DNV-OS-F101standards, CO2 stress cor-rosion test, high-temperature and high-pressure CO2 corrosion test as well as the galvanic couple corrosion test were performed on the welded joints , respectively .The morphology and composition of the corrosion samples were analyzed .The results show that no crack appear after CO2 stress corrosion, and the mass loss is also qualified.The high-temperature and high-pressure CO2 corrosion is uniform and mild, and the corrosion rate is 0.002 mm/a.The galvanic couple corrosion test shows that the weld is of good corro-sion resistance in 3.5%NaCl solution.