腐蚀

The corrosion mechanism of naphthenic acid in crude oil, influence factors and progresses in test methods at high temperature were summarized.

综述了高温环烷酸腐蚀的机理、影响因素和腐蚀试验方法的研究进展。

The corrosion and erosion-corrosion behaviors of A3 carbon steel in naphthenic acid mediums at high temperature were studied in detail.

1前言高温环烷酸腐蚀和冲刷腐蚀是世界炼油工业的宿敌，也是目前炼油厂亟待解决的难点问题之一。

The weight loss method, electrochemical impedance spectroscopy and surface analysis methods were employed to investigate the corrosion behavior of steel A3 under the combined effect of Streptomyces and Nocardia sp.

采用腐蚀失重法、电化学交流阻抗法和表面分析技术研究了A3钢在链霉菌和诺卡氏菌共同作用下的腐蚀行为。

Results showed that the combined effect of Streptomyces and Nocardia sp markedly increased the corrosion tendency of steel A3, decreased the impedance value and increased the corrosion current density of the electrode after 21 days of exposure.

结果表明，与单种菌相比，混合菌作用下试样表面的腐蚀倾向增大，阻抗值降低，腐蚀电流密度增加。

The comprehensive effect of partial acidlity of working medium, flowing status of fluid, nocuous material in atmosphere, together with the overlong usage, largely increased the corrosion rate and caused the leakage.

结果表明，泄漏的主要原因是焊接缺陷导致焊缝区发生缝隙腐蚀，而工作介质的局部酸性、流体的流动形态、大气中有害物质、温差应力等综合作用，加上使用期过长等加剧了腐蚀，导致该塔泄漏。

This paper investigated the effects of environmental factors, such as, pH, buffer capacity, the concentration of chloride ions and the concentration of nonaggressive anions, on the crevice corrosion potential E_(cc of Type 304 stainless steel. The E_c was ascertained by galvanodynamic polarization.

本实验主要研究pH 值、缓冲容量、氯离子浓度及其缓冲溶液中其它阴离子浓度等环境因素对304 不锈钢缝隙腐蚀电位的影响，缝隙腐蚀电位由动电位扫描确定。

In borate or phosphate buffered NaCl solutions with a constant total concentration of borate or phosphate, E_ increases with an increase in pH. With the increase of the concentration of chloride ions, E_ decreases markedly in the test solutions. Moreover, the buffer capacity and concentration of nonaggressive anions in the test solutions also exerts some effects on the crevice corrosion of Type 304 stainless steel. Furthermore, the cooperative inhibition effect of the environmental factors on crevice corrosion was investigated. The potential of crevice corrosion E_(cc shows a strong dependence on a parameter J, which was called as general environmental factor and defined as the product of concentration of nonaggressive anions, pH, buffer capacity and concentration of chloride ions.

在含NaCl 的硼酸或磷酸盐缓冲溶液中，在相同的缓冲溶液总浓度下，E_c随pH 值增加而增加；但随着氯离子浓度的增加，E_c显著降低；另外缓冲容量及其阴离子对304 不锈钢缝隙腐蚀也有影响；最后实验研究了这些环境影响因素的协同影响规律，得出环境综合影响因素参数J，J 由pH 值、缓冲容量、氯离子浓度及其缓冲溶液中其它阴离子浓度定义，缝隙腐蚀电位与参数J 有好的线性关系。

Through training and simulating the data came from the indoor simulation orthogonally experiment and the field survey, the web model based on Matlab language to forecast 20# steel's corrosion behavior in Daqing oil field is built.

用基于Matlab语言的人工神经网络工具箱对从室内模拟埋片实验及现场调查得出的土壤腐蚀数据进行训练、仿真，从而建立了能够预测20#钢在大庆油田地区土壤中的腐蚀行为的网络模型。

Two kinds of high aluminum alloys were not suffered from both intergranuler corrosion and stress corrosion craking when the aluminum overlayer was perfact.

两种包铝高强铝合金板材在包铝层完好时均对晶间腐蚀和应力腐蚀裂开的敏感性差。

Zn-La alloys increase the overpotential ofhydrogen evolution, Tafel slope 〓 and polarization, decrease the corrosion current density, inhibitthe corrosion of zinc electrode in alkaline solution, decrease anode Tafel slope 〓, promotedischarge reaction of zinc electrode, have higher passivation current density, inhibit thepassivation of zinc electrode, avoid the oversaturation of zincate in electrolyte, greatly increase〓 diffusion coefficient, decrease Tafel slope 〓, polarization and the overpotential of deposition,inhibit the dendrites formation and improve the electrodepostion of Zn.

实验结果表明，Zn-La合金电极显著改善了锌电极的各项电化学性能：提高析氢过电位、析氢过程Tafel斜率〓和极化，减小腐蚀电流密度，抑制锌电极在碱液中的腐蚀；降低阳极Tafel斜率〓，促进了锌电极的放电反应；具有较高的维钝电流密度，抑制锌电极的钝化；有效避免了溶液中锌酸盐的过饱和现象：使〓的扩散系数明显增大：降低Zn沉积过程的Tafel斜率〓、极化和沉积过电位，明显抑制锌枝晶的生长，改善了锌的电沉积性能。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！