紫铜在含S有机润滑油中的腐蚀行为
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摘要
研究紫铜在含S有机润滑油中的腐蚀行为,进而探究紫铜对此类有机润滑油的腐蚀作用机制。采用气相色谱-质谱联用(GC-MS)分析润滑油成分,通过金相显微镜(OM)、扫描电子显微镜(SEM)、能谱仪(EDS)、X线光电子能谱仪(XPS)及电化学极化曲线等手段,分析润滑油的残留物对紫铜制品表面腐蚀的影响。结果表明:润滑油主要包含C_(24)H_(49)SO_3、C_5H_8Cl_2、饱和链烷烃等;紫铜表面出现严重的点蚀,腐蚀产物主要为CuCl_2、CuO、Cu(OH)_2和CuSO_4。结合化学滴定和X线衍射(XRD)分析发现,含S和Cl的有机润滑油在一定条件下与水作用产生的SO_4~(2-)及Cl~-活性阴离子,是紫铜发生点蚀的主要原因。
The copper corrosion mechanisms in the lubricating oil containing organic sulfur was explored.The contents of the lubricating oil were tested by gas chromatography-mass spectrometry( GC-MS),and the influences of the residual lubricating oil on the corrosion behavior of copper were analyzed by metallographic microscope( OM),scanning electron microscope( SEM),X-ray photoelectron spectrometer( XPS) and electromic workstation. Results showed that the lubricanting oil mainly contained C_(24)H_(49)SO_3,C_5H_8Cl_2,saturated paraffin,etc. Severe pitting corrosion appeared on the copper surface,and the corrosion products were mainly consist of CuCl_2,CuO,Cu(OH)_2,and CuSO_4. Combined with chemical titration and X-ray diffraction( XRD),the lubricating oil reacted with water to produce SO_4~(2-) and Cl~- in some conditions,which was the main cause of pitting corrosion on copper.
The copper corrosion mechanisms in the lubricating oil containing organic sulfur was explored.The contents of the lubricating oil were tested by gas chromatography-mass spectrometry( GC-MS),and the influences of the residual lubricating oil on the corrosion behavior of copper were analyzed by metallographic microscope( OM),scanning electron microscope( SEM),X-ray photoelectron spectrometer( XPS) and electromic workstation. Results showed that the lubricanting oil mainly contained C_(24)H_(49)SO_3,C_5H_8Cl_2,saturated paraffin,etc. Severe pitting corrosion appeared on the copper surface,and the corrosion products were mainly consist of CuCl_2,CuO,Cu(OH)_2,and CuSO_4. Combined with chemical titration and X-ray diffraction( XRD),the lubricating oil reacted with water to produce SO_4~(2-) and Cl~- in some conditions,which was the main cause of pitting corrosion on copper.
引文
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[3]王岳化,腾志君,高玉保,等.铜线表面氧化研究及处理方法[J].低压电器,2012(22):8.
[4]徐娜,李永德,时军波,等.发电厂凝汽器铜管腐蚀穿孔失效分析[J].热加工工艺,2013,42(8):221.
[5]刘轶强,贺天元.紫铜管材表面变色机制与微观形貌特征[J].热加工工艺,2015,44(10):230.
[6]王长罡,邓为民,赵广宇,等.换热器T2紫铜管在潮湿状态下的腐蚀机理研究[J].金属学报,2012,48(7):815.
[7]罗正贵.铜表面十二硫醇膜的抗氧化腐蚀研究[D].苏州:苏州大学,2004.
[8]罗正贵,闻荻江.铜的腐蚀及防护研究进展[J].武汉化工学院学报,2005,27(2):17.
[9]单佳慧,刘晓勤,岳军,等.汽油中硫含量的分析方法进展[J].南京工业大学学报(自然科学版),2007,29(5):106.
[10]张静.铜及其合金光亮防锈表面处理技术的研究[D].无锡:江南大学,2008.
[11]万晔,于欢,孔祥宇.紫铜在中高温条件下的腐蚀行为[J].材料导报,2010,24(6B):58.
[12]林育锋,孔小东,田志强,等.两种紫铜在3. 5%Na Cl溶液中的腐蚀性能比较[J].装备环境工程,2011,8(5):29.
[13]钟万里,聂铭,梁永纯,等.在不同p H值模拟酸雨溶液中纯铜的腐蚀行为[J].材料研究学报,2015,29(1):60.
[14]周志辉.纯水中铜的腐蚀规律的研究及其缓蚀剂的应用[J].华北电力技术,2004(4):22.