研究了P110油管钢在CO2 饱和的模拟油田采出液中 ,阳极极化下的EIS谱随温度的变化规律 .结果表明 :在低于 90℃的范围内 ,存在一个谱图转变临界温度 ,临界温度之下为三个时间常数型谱图 ,临界温度之上为两个时间常数型谱图 .从阳极反应机理和CO2 腐蚀特征出发对试验结果进行了解释 .
李静
,
孙冬柏
,
俞宏英
,
李辉勤
,
孟惠民
,
杨德钧
. CO_2环境中P110钢阳极溶解过程EIS特征[J]. 电化学, 2001
, 7(1)
: 120
-125
.
DOI: 10.61558/2993-074X.3244
Effect of temperature on the electrochemical impedance spectroscopy for P110 steel at anodic polarized potential was investigated in simulated CO 2 saturated oil produced water. The results demonstrated that in the range from room temperature to 90 ℃, there was a critical temperature , below which a three time constant impedance spectrum was observed and above which a two time constant spectrum was shown. A reasonable explanation was given to this phenomenon in an effort to elucidate the mechanism of anodic dissolution and characteristics of CO 2 corrosion.
[1] PalaciosC .A ,ShadleyJ .R .CharacteristicsofcorrosionscalesonsteelsinaCO2 saturatedNaClbrine [J].Corrosion ,1991,4 7(2 ) :12 2 .
[2 ] Lijing ,et .CorrosionmechanismofsteelP110inCO2 containingsimulatedoilfieldbrine [J].JournalofChi neseSocietyforCorrosionandProtection .1999,19(5) :2 85.
[3] Arnedugstad ,LivLunde .ParametricstudyofCO2 corrosionofcarbonsteel [A].In :NACEInternational,Corrosion/ 94 [C],Houston ,Texas :NACEInternational,PublicationDivision ,1994 :1～ 16 .
[4 ] CaoChunan .OntheEquivalentCircuitsofFaradaicImpedanceofIrreversibleElectrodeReactions [J].Jour nalofChineseSocietyForCorrosionandProtection .,1990 ,10 (2 ) :159.
