腐蚀

Dezincification of duplex brass , which is a form of corrosion. may occur when in contact with cart ain aggressive waters.

两相黄铜脱锌现象，是一种腐蚀，当接触到某些侵蚀性水时可能发生。

Based on the original production process, the developed corrosion inhibitor used for polyurethane foaming changes the pH of dialyzate, which is produced from submerging polyurethane foam to water, from acidity into faint alkalinity, so as to inhibit or retard corrosion of the pipeline.

研制成的聚氨酯泡沫用缓蚀剂，在不改变原有生产工艺及发泡参数的基础上，将聚氨酯泡沫浸水析出液的pH值由酸性改变为弱碱性，从而达到抑制或延缓泡夹管腐蚀的目的；采用喷涂聚脉补口技术，有效地提高了现场补口的质量。

This could be attributed to the reduction of diamagnetic ion hydrate on the iron/solution interface and the adsorption of Fe2+ on the iron surface, which are responsible for the change of electric double layer structure and the increase of activity in the corrosion system.

认为这是由于磁场使铁－水溶液界面抗磁性离子的水合作用减少和使Fe2＋有吸附于铁电极表面的倾向，导致双电层结构的改变和腐蚀体系的活性增加。

Effect of magnetic field on open circuit corrosion and polarization resistance for iron in sulfuric acid containing dichromate .

含重铬酸根硫酸溶液中磁场对铁自腐蚀状态及极化电阻的影响。

The influence of Ce, Nd and Sr on the as-cast microstructure of AZ91 alloy was investigated by optical microscope、scanning electron microscope、electron probe microscope analyzer、differential thermal analyzer and X-ray diffract analyzer, et al.

本文以目前使用最广泛的AZ91镁合金为研究对象，分别添加不同含量的稀土元素Ce、Nd和碱土元素Sr，研究了三种元素对AZ91镁合金微观组织和腐蚀性能的影响。

The distribution of temperature stress was calculated by finite element analysis. The results showed when the surface temperature of concrete was higher than 110℃, the temperature stress was more than 4 MPa without regard to the creep. This might be lead to the damage of the surface of concrete. At the same time, a lot of microstructure analysiss such as XRD, SEM, IR, HSA etc. were done to analysis the difference of the component and microstructre of concrete before and after corrosion. The results indicated that the decomposion of CSH gel and calcium hydroxide and the creation of dilatability calcium oxide were the internal reason of the deterioration of concrete in the corrosion form of high heat.

该文通过有限元方法计算了由于温度而产生的结构应力分布，计算结果表明当混凝土表面温度超过110℃时，如不考虑徐变时表层混凝土受到的温度应力将超过4MPa，这使得表层混凝土很容易因温度应力而破坏；同时通过X射线衍射分析、扫描电子显微分析和混凝土孔结构分析等多种微观结构测试手段，分析了混凝土受热前后的宏观性能以及微观组成和结构的变化，指出混凝土原水化产物如水化硅酸钙凝胶和氢氧化钙的分解以及膨胀性产物氧化钙的产生是高热腐蚀形式下混凝土破坏的内在原因。

At last the necessary and sufficient condition of true dilation and true erosion are discussed.

证明了真膨胀的充要条件与真腐蚀的充分条件。

In addition, remaining strength assessment and remaining life prediction are involved in direct examination and post-assessment of the Direct Assessment process.

另外，在外腐蚀直接评价过程的直接检查和后期评价步骤中涉及到管道剩余强度评价和剩余寿命预测。

Due to the printing plate is bakeout, multikinetic and dirty float in the background, it cannot be cutter or corrosion bars such as a hard object handle, can only be used to clean the way to get rid of it.

由于印版被烘烤过，脏迹又浮在底色上，故不能用刀片或腐蚀棒之类的硬物处理，只能用擦的办法将其除掉。

Coating Disbandment Leads Causes of External Pipeline Corrosion［J］.

油气管道腐蚀原因及主要防护措施［J］。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失