腐蚀的

With the increase of pipeline's service time, is the pipeline corroded?

由于海底管线的腐蚀是一种长期缓慢的过程，随着管线服役时间的增加，管线的腐蚀状态如何？

Results from column experiments show that the presence of 1 000 mg/L chloride ion decrease iron corrosion potential and promote removal of the passivating oxide layer and pitting corrosion of the iron, which can sustain and increase granular iron reactivity.

柱实验表明，1000mg/LCl的存在，铁腐蚀电位降低，可促进钝化氧化物层的去除和铁的点状腐蚀从而增强颗粒铁对Cr的去除。

The results showed that when retrogressed by electrical current heating at 200 ℃ the tensile strength in re-aged 7A04 alloy extrusion bar of 60 mm in diameter reached 620-640 MPa and a uniform elongation appeared from central part to surface layer of the sample while the fracture time in test of resistance to stress corrosion under a load stress of 375MPa in 3%NaCl+0.5%H2O2 corrosion solution was greater than 30 d.

结果表明，直径60 mm的7A04铝合金棒材在200℃电流直接加热回归后再时效，从心部到表层的拉伸强度为620-640 MPa，延伸率均匀一致；在3%NaCl+0.5%H2O2水溶液介质中和375 MPa应力下的应力腐蚀断裂时间大于30d，而辐射式加热回归的为575 MPa，延伸率从心部至表层表现极不均匀，应力腐蚀断裂时间只有19 d。

The results showed that when retrogressed by electrical current heating at 200℃the tensile strength in re-aged 7A04 alloy extrusion bar of 60 mm in diameter reached 620- 640 MPa and a uniform elongation appeared from central part to surface layer of the sample while the fracture time in test of resistance to stress corrosion under a load stress of 375MPa in 3%NaCl+0.5%H_2O_2 corrosion sol...

结果表明，直径60 mm的7A04铝合金棒材在200℃电流直接加热回归后再时效，从心部到表层的拉伸强度为620-640 MPa，延伸率均匀一致；在3%NaCl+0.5%H_2O_2水溶液介质中和375 MPa应力下的应力腐蚀断裂时间大于30 d，而辐射式加热回归的为575 MPa，延伸率从心部至表层表现极不均匀，应力腐蚀断裂时间只有19 d。

Protection from corrosion: before goods are packed, materials which are liable to deterioration during transit should be properly treated with protective;highly polished metal surface are particularly subject to the dangers of rust and corrosion;It is customary to coat the surfaces thickly with a slushing oil; anti-corrosive compounds, films, wax or grease should be applied.

防腐蚀包装：在货物包装之前，对在运输过程中可能变质的材料采取适当的防护处理；抛光的金属表面很容易生锈和腐蚀。通常在表面刷上一层厚厚的抗腐蚀润滑油；防腐化合剂、薄膜、蜡、润滑油等是必用之物。用刷子、喷漆枪涂上，或在浸泡桶里加以处理；密封的容器和除湿化合物，如可用硅脂胶体；大体积液体通常装在鼓形圆桶或罐里；一些材料应该用防水纸或石蜡包纸；为了预防高危险材料，船运公司规定了包装规格；箱子应该与防水纸和布一致。

The article recounts the present phenomenon that when the content of acid gas of blast furnace gas becomes higher, it will cause gas pipelines and its attached equipments corrosion become more and more serious.

叙述高炉煤气中的酸性气体含量的增高，使煤气管网及其附属设备的腐蚀日趋严重的现状，济南钢铁有限公司采用了喷碱液中和，加强保温，加内衬与防腐以及源头处理等方式减少腐蚀。

Passive film was formed onto the surface of stainless steel in nitric acid solution.

在90℃温度均匀腐蚀条件下，经过40天后，321不锈钢样品在低酸度的硝酸铀酰溶液中的腐蚀速率小于0.04g／m〓。h，铀酰离子以六水硝酸铀酰的形式吸附于321不锈钢表面，在含氯离子和次氯酸根离子的硝酸铀酰溶液中，321不锈钢发生了点蚀，出现了点蚀坑。

There is no serious selective corrosion in the bainite steel for the corrosion has little effect on its tensile mechanical properties.

在三种环境中的腐蚀对钢的拉伸力学性能的影响较小，说明没有产生严重的局部腐蚀。

CO2 corrosion is one of the most common corrosions in oil and gas industry, so the anti-corrosion technology, closely related to the quality and working life of CO2-contained gas wells, is the basis for safe and highly efficient production of gas wells.

CO2腐蚀是世界石油天然气工业中常见的一种腐蚀类型，含CO2气井的相关工艺技术直接关系着气井的质量与寿命，是气井安全、高效生产的基础。

For the corrosion of food machine ,the author introduces the characteristics of some prevalent corrosions,and then expatiates the preventive control of food machine ′s antisepsis in design process,including material choosing,structure design and manufacture.

针对食品机械的腐蚀，本文首先介绍了几种最常见的腐蚀形态的特点，然后从材料选择、结构设计、加工制造等方面阐述了在设计阶段实现食品机械防腐的预防性控制措施。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。