当前位置：
X-MOL 学术
›
Mater. Corros.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Corrosion behavior of UCX, KHR35, and KHR45 alloys in molten nitrates
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-07-23 , DOI: 10.1002/maco.202011579 Daniel Brito‐Hernandez 1 , Roy Lopez‐Sesenes 2 , Sergio Haro 3 , Jesus Porcayo‐Calderon 1 , Jose G. Gonzalez‐Rodriguez 1
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-07-23 , DOI: 10.1002/maco.202011579 Daniel Brito‐Hernandez 1 , Roy Lopez‐Sesenes 2 , Sergio Haro 3 , Jesus Porcayo‐Calderon 1 , Jose G. Gonzalez‐Rodriguez 1
Affiliation
|
The corrosion behavior of three high‐Ni, high‐Cr alloys, that is, UCX, KHR35, and KHR45 alloys, in a mixture of 60% NaNO3–40% KNO3 at 600°C has been evaluated by using weight loss tests, potentiodynamic polarization curves, and electrochemical impedance spectroscopy measurements. Cr contents ranged between 23.25 and 43.2 wt.%, whereas Ni ranged between 36.6 and 50.3 wt.%. For comparison, the same studies were performed on 304‐type stainless steel (304SS). Tests were complemented with detailed scanning electronic microscope and X‐ray diffraction studies. Results showed that that the three high‐Ni, high‐Cr alloys had lower weight loss than that for 304SS. Polarization tests indicated the formation of a passive layer in all cases. Electrochemical impedance spectroscopy data have shown that the corrosion mechanism for all the alloys was charge transfer from the alloy to the molten salt. Finally, X‐ray patterns showed the presence of Cr2O3 in all tested alloys, which is responsible for the observed passive behavior and their corrosion resistance.
中文翻译：
UCX，KHR35和KHR45合金在熔融硝酸盐中的腐蚀行为
在60％NaNO 3 –40％KNO 3的混合物中，三种高Ni，高Cr合金，即UCX，KHR35和KHR45合金的腐蚀行为通过使用失重测试，电位动力学极化曲线和电化学阻抗谱测量，对600°C下的温度进行了评估。Cr含量为23.25-43.2重量％，而Ni为36.6-50.3重量％。为了进行比较，对304型不锈钢（304SS）进行了相同的研究。测试辅以详细的扫描电子显微镜和X射线衍射研究。结果表明，三种高镍，高铬合金的重量损失均低于304SS。极化测试表明在所有情况下均形成了无源层。电化学阻抗谱数据表明，所有合金的腐蚀机理都是电荷从合金转移到熔融盐中。最后，X射线图显示了Cr 2 O的存在在所有测试的合金中为3，这是观察到的被动行为及其耐蚀性的原因。
更新日期：2020-07-23
中文翻译：
UCX，KHR35和KHR45合金在熔融硝酸盐中的腐蚀行为
在60％NaNO 3 –40％KNO 3的混合物中，三种高Ni，高Cr合金，即UCX，KHR35和KHR45合金的腐蚀行为通过使用失重测试，电位动力学极化曲线和电化学阻抗谱测量，对600°C下的温度进行了评估。Cr含量为23.25-43.2重量％，而Ni为36.6-50.3重量％。为了进行比较，对304型不锈钢（304SS）进行了相同的研究。测试辅以详细的扫描电子显微镜和X射线衍射研究。结果表明，三种高镍，高铬合金的重量损失均低于304SS。极化测试表明在所有情况下均形成了无源层。电化学阻抗谱数据表明，所有合金的腐蚀机理都是电荷从合金转移到熔融盐中。最后，X射线图显示了Cr 2 O的存在在所有测试的合金中为3，这是观察到的被动行为及其耐蚀性的原因。
京公网安备 11010802027423号