HC1塔腐蚀原因分析及工艺改进措施

分析了甲烷氯化物生产中ＨＣ１分离塔腐蚀原因并提出改进措施,解决了腐蚀问题。     

CO_2压缩机腐蚀原因分析及改进措施

以CO2对碳钢材质的腐蚀机理着手,对尿素装置CO2压缩机发生严重腐蚀的原因进行了分析,并找出了有效的改进措施。     

氯化循环冷却器腐蚀原因分析及改进措施

分析氯化循环冷却器腐蚀原因，并提出了改进措施。     

皂化釜腐蚀原因及改进措施

通过对皂化釜腐蚀损坏原因的分析，提出了对皂化釜的材料选择及制作的改进措施。     

旋风分离器腐蚀原因及改进措施

通过对氧氯化反应器旋风分离器腐蚀原因的分析，提出了旋风分离器的材料选择方案及安装的改进措施。     

氨冷却器的腐蚀原因分析与改进措施

根据现场实际以及实际生产经验,通过对循环冷却水的分析、腐蚀部位特点及金相分析得出氨冷却器腐蚀的主要原因。换热管束内表面光洁度不够能够加快腐蚀与结垢,非金属类的杂质存在也能降低材料抗腐蚀的能力。     

二甲醚汽化塔腐蚀原因分析及处理措施

公司二甲醚装置采用的是四川天一科技股份有限公司甲醇气相脱水法生产工艺,设计产量为10万t/a.二甲醚汽化塔发生腐蚀主要与使用的甲醇原料、超负荷运行、开停车频次、汽化塔加碱量稳定性等因素有关.对影响汽化塔腐蚀的主要因素进行了分析、总结,并提出了解决方法.     

变换气冷却塔腐蚀原因分析及改进

分析变换气冷却塔失效原因，认为主要是电偶腐蚀造成的。更新时将塔体材质改为16MnR＋0Cr18Ni10Ti复合板，设备内部腐蚀甚微，证明选材切实可行。     

转化器腐蚀原因分析及改进措施

分析了转化器腐蚀原因,并提出相应的防腐措施。     

氯乙烯生产工艺的技术改进

介绍了新疆石河子中发化工有限责任公司在氯乙烯生产过程中所采取的工艺改进措施,这些措施使企业在环保和节能方面取得了一定的成绩,降低了生产成本,促进了企业的健康、持续发展。     

盐酸解吸技术的改进

介绍了黑龙江齐化化工有限公司对盐酸解吸装置的工艺和设备进行改进的情况。     

盐水工序设备腐蚀的原因及预防措施

介绍四平联合化工股份有限公司氯碱总厂盐水工序设备腐蚀产生的原因及采取的预防措施     

锅炉设备碱性腐蚀原因分析及水处理工艺改进

锅炉的碱性腐蚀经常被人们所忽视,但其造成的后果往往是非常严重的,轻则造成爆管导致停产,重则会威胁到操作人员的人身安全。传统的锅炉水处理方法虽然价格低廉,但其存在先天的不足,在一定条件下无法阻止碱性腐蚀的发生。而近些年逐渐产生的锅炉水处理工艺及与其配套的有机锅炉水处理药剂则全方面改进了传统锅炉水处理方法的不足,并在现场应用中收到了良好的效果。     

造气工艺改造对产气量和煤气质量的影响

针对造气工艺存在的问题,对原造气工艺进行了一系列技术改造,分析了改造后的运行效果及带来的经济效益。     

Correlation between accelerated corrosion tests and atmospheric corrosion tests on steel

Three kinds of steel [soft steel (SPHC), carbon steel (SS400), and weathered steel (A588)] were prepared for accelerated corrosion and atmospheric corrosion tests. The results of atmospheric corrosion tests were similar to those of accelerated corrosion tests. A correlation was developed for prediction of atmospheric corrosion rates of steel using atmospheric corrosion factors (i.e. Cl⁻ deposition fluxes, time of wetness, and temperatures). The comparisons between predicted and measured thickness losses due to atmospheric corrosion showed an average error of 31.6%. In addition, Tafel plots were employed to evaluate the corrosion behaviour of the three kinds of steel. The morphology of the cross-sections of specimens exposed outdoors was examined by scanning electron microscopy (SEM). The results of the Tafel extrapolation tests and SEM observations of the surface morphology were similar to those seen in the atmospheric corrosion tests.     

高纯盐酸及氯化氢工艺的优化

通过对氯化氢吸收工艺进行改造,将生成的不合格盐酸重新吸收为合格盐酸。     

Aniline and some of its derivatives as corrosion inhibitors for nickel in 1 M HCl solution

The inhibiting action of aniline and some of its derivatives (o‐, m‐ and p‐anisidine) towards the corrosion behaviour of nickel in 1 M HCl solution has been studied using weight loss and polarization techniques. These compounds were found to retard the corrosion rate of nickel. At constant temperature, the corrosion rate decreases with increasing inhibitor concentration. On the other hand, at any inhibitor concentration, the increase in temperature leads to an increase in the corrosion rate. The activation energy, ΔE_a, the equilibrium constant, k, as well as the other thermodynamic parameters (ΔG, ΔH and ΔS) for inhibitor process were calculated and analysed. The inhibitor efficiencies calculated from both weight loss and polarization methods are in good agreement and were found to be in the order: p‐anisidine > o‐anisidine > m‐anisidine > aniline. The inhibitive action of these compounds was attributed to the adsorption of molecular species and their inhibitive efficiencies depend on the relative position of the  OCH₃ group in the aniline ring. © 1999 Society of Chemical Industry     

盐水预热器腐蚀的原因及对策

分析了盐水预热器腐蚀的原因,包括盐水腐蚀、应力腐蚀、杂散电流腐蚀和温差电池腐蚀。提出通过保证工艺、结构的合理性,严格控制盐水的 pH 值和温度及控制杂散电流腐蚀等措施可使盐水预热器的运行状态得到改善。