石油与天然气化工
石油與天然氣化工
석유여천연기화공
CHEMICAL ENGINEERING OF OIL AND GAS
2015年
2期
78-82
,共5页
离子渗氮%X80 管线钢%电化学腐蚀%土壤模拟溶液%库尔勒
離子滲氮%X80 管線鋼%電化學腐蝕%土壤模擬溶液%庫爾勒
리자삼담%X80 관선강%전화학부식%토양모의용액%고이륵
plasma nitriding%X80 pipeline steel%electrochemical corrosion%soil simulated solu-tion%Kuerle
通过对 X80钢进行离子渗氮处理,研究其在库尔勒土壤模拟溶液中浸泡30天的耐腐蚀性能。通过动电位极化曲线和阻抗谱测试 X80钢渗氮层对腐蚀性能的影响。结果表明,经离子渗氮的试样比 X80钢更耐蚀,其自腐蚀电位为-393 mV,比 X80钢高出337 mV,自腐蚀电流密度为0.046 A/cm2,约是 X80钢的1/1000。离子渗氮处理使 X80钢表面生成了ε相和γ′相,可显著提高自腐蚀电位,使腐蚀反应更难发生。同时,显著降低了自腐蚀电流密度。采用 SEM、XRD 和 EDS 技术对腐蚀产物膜的表面形貌和组成成分进行测试分析表明,腐蚀产物主要是 Fe3 O 4和β-FeOOH。
通過對 X80鋼進行離子滲氮處理,研究其在庫爾勒土壤模擬溶液中浸泡30天的耐腐蝕性能。通過動電位極化麯線和阻抗譜測試 X80鋼滲氮層對腐蝕性能的影響。結果錶明,經離子滲氮的試樣比 X80鋼更耐蝕,其自腐蝕電位為-393 mV,比 X80鋼高齣337 mV,自腐蝕電流密度為0.046 A/cm2,約是 X80鋼的1/1000。離子滲氮處理使 X80鋼錶麵生成瞭ε相和γ′相,可顯著提高自腐蝕電位,使腐蝕反應更難髮生。同時,顯著降低瞭自腐蝕電流密度。採用 SEM、XRD 和 EDS 技術對腐蝕產物膜的錶麵形貌和組成成分進行測試分析錶明,腐蝕產物主要是 Fe3 O 4和β-FeOOH。
통과대 X80강진행리자삼담처리,연구기재고이륵토양모의용액중침포30천적내부식성능。통과동전위겁화곡선화조항보측시 X80강삼담층대부식성능적영향。결과표명,경리자삼담적시양비 X80강경내식,기자부식전위위-393 mV,비 X80강고출337 mV,자부식전류밀도위0.046 A/cm2,약시 X80강적1/1000。리자삼담처리사 X80강표면생성료ε상화γ′상,가현저제고자부식전위,사부식반응경난발생。동시,현저강저료자부식전류밀도。채용 SEM、XRD 화 EDS 기술대부식산물막적표면형모화조성성분진행측시분석표명,부식산물주요시 Fe3 O 4화β-FeOOH。
This paper studied the corrosion resistance of X80 steel in Kuerle soil simulated solution for 30 days after the surface of X80 steel was treated by plasma nitriding.The influence of plasma ni-triding layer of X80 steel on corrosion property was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS).The results showed that the corrosion resistant of plasma nitriding treated specimen are more stronger than the raw X80 steel,with a corrosion potential of about -393 mV and a corrosion current density of about 0.046 μA·cm-2 ,which are about 337 mV higher than X80,and only about 1/1 000 of the corrosion current density of X80 steel.Compared with the X80 steel,theεphase andγ′phase by nitrides increased the corrosion potential significantly, which caused the happen of corrosion reaction more difficultly,and reduced the corrosion current den-sity greatly.The surface morphology and composition of corrosion products were investigated by SEM,XRD and EDS.The result indicated that the corrosion products were mainly composed ofβ-FeOOH and Fe3 O 4 .
