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腐蚀作用

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Based on the mechanisms for stress-assisted corrosion problem in oil-pipe system, authors have carried out numerical simulation, with application of Charles-Hillig Model 10 to study the behavior of crack propagation, where the advanced front-tracking method has been employed for finite element mesh construction and re-construction.

基于油气管道表面微裂缝在应力和腐蚀耦合作用下的扩展机理,根据Charles-Hillig模型用数值方法模拟了裂缝的动态扩展过程。研究的重点是确定裂缝扩展时的形态以及可以避免应力腐蚀现象的载荷和环境条件。

That is less copper anion in the environment. PASP has the effect of corrosion inhibition in hydrochloric acid solution. In addition the potation of cathode summit current turned negative as increasing PASP concentration, and the potential of anode summit current turned positive, it can constrain the corrosion of copper. That is to say PASP is a mixed corrosion inhibitor and can constrain the corrosion of copper surface.

循环伏安测试结果表明: PASP的加入同时抑制了铜表面的阴阳极反应,使阴极峰和阳极峰电流都减弱,说明此环境中的铜离子的含量较少,PASP对铜在盐酸中有缓蚀作用;另外阴极峰电位随着PASP添加浓度的增大而依次变负,而阳极峰电位依次变正,抑制了铜的腐蚀,说明PASP是混合型缓蚀剂,有效地阻止了铜表面的腐蚀。

The white rust on the surface of lead showed less protectiveness generally.

而铅在自来水、人工海水和湿热箱中腐蚀程度有所减缓,铅表面生成的腐蚀产物对铅有一定的保护作用。

Dust may be an active center during the corrosion of contact surface.

所以,尘土在电接触表面的腐蚀过程中,起了一个"加速腐蚀"的作用。

In seawater and fresh water, aluminum alloy was not corroded as the all protection of alclad. In salt lake, the alclad on LC4 aluminum alloy remaindered for half a year, and used up for one year. The base of LC4 aluminum alloy was corroded seriously.

在海水和淡水中,包铝层可以对铝合金基材起到完全的保护作用,使基材免遭腐蚀;而在盐湖水中,半年时LC4铝合金表面尚有包铝存在,而一年时LC4铝合金表面包铝已完全消耗至尽,LC4的基体发生严重腐蚀。

According to SEM observation, the corrosion regulation of LC4 aluminum alloy with alclad in China water system and the protection of alclad on LC4 were studied. The corrosion experiment was done in seawater of Qingdao, Zhoushan, Xiamen, salt lake with high salinity of Geermu, and fresh water of Changjiang River in Hankou.

利用带包铝LC4铝合金在东部地区海水、西部地区盐湖水、中部地区淡水中的暴露腐蚀试验,对盐湖水中包铝对铝合金基体的保护作用行为进行了探讨,得到带有包铝的LC4铝合金在水系统中的腐蚀规律。

The failure behavior of SS316L has been investigated under environment and stress coaction by corrosion fatigue device.

本工作运用自制的腐蚀疲劳试验机,研究了在环境与应力协同作用下,316L不锈钢的失效行为和过程,证实了不锈钢的失效过程中存在着多种腐蚀类型的交。。。

Applying with the Femlab software, the deformation of protective erodent products film in three different ways were analyzed, including different flows in reducer, different structures of reducer and different specifications of reducer.

建立流固耦合数理模型,推导出在任意拉格朗日-欧拉(Arbitrary Lagrange-Euler, ALE)描述下的黏性流体N-S方程和腐蚀产物保护膜固体区域的控制方程,分析管壁边界层多相流介质流动与腐蚀产物保护膜破损之间的耦合作用。

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。

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Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严,以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆,把帆卷起,系住。

Therefore, positively advances the interest rate marketability reform is one of current our country finance reform important tasks.

因此,积极推进利率市场化改革是当前我国金融改革的重要任务之一。