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首页> 外文会议>Corrosion conference and expo >Anodic Behavior of Nickel base Alloys in Media Containing Bicarbonate and Chloride Ions
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Anodic Behavior of Nickel base Alloys in Media Containing Bicarbonate and Chloride Ions

机译：镍基合金在含碳酸氢根和氯离子的介质中的阳极行为

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The simultaneous presence of bicarbonate and chloride ions may be necessary to induce stress corrosion cracking (SCC) in alloy 22 at anodic applied potentials. It has been suggested that the susceptibility to SCC could be related to the occurrence of an anodic peak in the polarization curves below the transpassive range. The aim of this preliminary work is to study the anodic behavior of alloy 22 and three other nickel alloys in different media containing various concentrations of bicarbonate and chloride ions as a function of the temperature to determine which element in the alloy maybe be responsible for the anodic peak and/or cracking. The studied materials included alloys 22, Ni-201, alloy 800H and 600. Results show that for alloy 22 the potential and the peak current increased with the temperature and chloride concentration in the solution. For the alloys with smaller alloying content the peak potential decreased to the point of disappearing. There was no dependence of the current of the peak with the amount of alloying. In a future work, slow strain rate tests will be performed to determine if there is correspondence between SCC and the presence of the anodic peak.
机译：碳酸氢根和氯离子的同时存在对于在阳极施加电势下在合金22中引起应力腐蚀开裂（SCC）可能是必需的。已经提出，对SCC的敏感性可能与在低于无源范围的极化曲线中阳极峰的出现有关。这项初步工作的目的是研究合金22和其他三种镍合金在不同介质中的阳极行为，该介质包含各种浓度的碳酸氢根和氯离子，并作为温度的函数，以确定合金中哪个元素可能是阳极的原因。峰值和/或破裂。研究的材料包括合金22，Ni-201，合金800H和600。结果表明，合金22的电势和峰值电流随溶液中温度和氯化物浓度的增加而增加。对于合金含量较小的合金，峰值电势下降到消失点。峰值电流与合金化量无关。在以后的工作中，将执行慢应变速率测试以确定SCC和阳极峰的存在之间是否存在对应关系。

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