Electrochemical and analytical study of corrosion inhibition on carbon steel in HCl medium by 1,12-bis(1,2,4-triazolyl)dodecane

1,12-bis(1,2,4-triazolyl)dodecane (dTC12) is an excellent corrosion inhibitor for carbon steel in deaerated 1 M HCl solution. In this work electrochemical and analytical techniques were used to study the inhibition of corrosion on carbon steel in acidic medium. The carbon steel corrosion inhibition of dTC12 was attributed to the synergistic effect between chloride anion and quaternary ammonium ion. The protective efficiency of the film was higher than 90%, indicating that corrosion of carbon steel in 1 M HCl is reduced by dTC12.The effect of dissolved oxygen on the inhibition efficiency was also investigated. The results show that the inhibition efficiency increases in early stage and decreases for a long immersion time.     

耐腐蚀高压柱塞泵用新型双相不锈钢的研究

叙述了新型双相不锈钢－ＷＳＤ钢的组织及其耐蚀性能。试验结果表明，ＷＳＤ钢在氯化物介显示出优异耐蚀性能，其抗点蚀性能远超过Ｃｒ１３，１８－８Ｔｉ，３１６Ｌ等钢种，达到国外Ａｌ－６Ｘ，ＳＡＦ２２０５等钢种的水平。     

常减压蒸馏装置高温部位的腐蚀与防护

阐述了常减压蒸馏装置高温部位的腐蚀机理，介绍了高温防腐蚀的三种方法：正确选材、高温缓蚀剂技术及喷涂渗铝技术，建议在类似的石化装置推广使用。     

Effects of blending on surface characteristics of copper corrosion products in drinking water distribution systems

Copper scales formed over 6-months during exposure to ground, surface and saline waters were characterized by EDS, XRD and XPS. Scale color and hardness were light red-brown-black/hard for high alkalinity and blue-green/soft for high SO₄ or Cl waters. Cl was present in surface or saline copper scales. The Cu/Cu₂O ratio decreased with time indicating an e transfer copper corrosion mechanism. Cu₂O, CuO, and Cu(OH)₂ dominated the top 0.5-1 A° scale indicating continuous corrosion. Cu₂O oxidation to CuO increased with alkalinity, and depended on time and pH. Total copper release was predicted using a Cu(OH)₂ model.     

炼厂硫腐蚀的典型案例分析及解决措施

通过硫在不同温度与环境下对金属材料腐蚀的典型案例分析，简述其腐蚀机理与解决,工对今后炼厂高硫油加工提出进一步建议。     

铁在盐酸中的缓蚀剂的两种作用类型的研究

通过腐蚀电位、极化曲线与交流阻抗测量研究了3种伯胺和丙炔醇对铁在盐酸中的缓蚀作用类型。结果表明,3种伯胺的缓蚀作用是几何覆盖效应,而丙炔醇的缓蚀作用则来自负催化效应。还证明,在强阳极极化的Tafel 直线区间,十二烷胺吸附在电极表面的覆盖率θ不随电位改变,十四烷胺的θ随电位的升高而增大。丙炔醇使铁阳极溶解反应活化能位垒增高的量.fa(θ)随电位升高而减小,其数值为df_a(θ)/dE=-73J·mol_-1.mV-1。     

Corrosion resistance of the electro-galvanized steel treated in a titanium conversion solution

The conversion coating can be obtained by using a solution containing titanium tetrachloride, fluorosilicate acid and nitric acid. The results of X-ray photoelectron spectroscopy (XPS) showed that the titanium conversion coating consisted of ZnO, TiO₂ and Zn₄Si₂O₇(OH)₂. The formation process of the titanium conversion coating was studied. Effects of the immersion time, pH value and solution temperature on the corrosion resistance and the chemical composition of the titanium conversion coating were investigated by the salt spray test (SST) and XPS, respectively. The results of XPS and SST showed that the titanium conversion coating displayed better corrosion resistance with higher contents of Si and Ti. Results of corrosion tests (the salt spray and electrochemical test) indicate that the corrosion resistance of the conversion coating by titanium solution is better than that of the conversion coating using the traditional chromate solution.     

混凝土结构的耐久性措施

在分析混凝土结构的腐蚀机理的基础上综述了目前对混凝土及其中钢筋的各种防护措施。     

航空发动机滑油系统镁合金微生物腐蚀与防护

针对航空发动机滑油系统镁合金部件的工作环境特点，结合外场出现的滑油系统故障分析和返厂大修某发动机统计资料，发现微生物是引起其腐蚀的主要原因。同时，提出一些防护措施。     

Ti－24Al－11Nb腐蚀疲劳断口形貌的研究

Ｔｉ－２４Ａｌ－１１Ｎｂ腐蚀疲劳断口形貌的研究张跃，褚武扬，王燕斌，肖纪美（北京科技大学北京１０００８３）１引言对Ｔｉ－２４ＡＩ－１１Ｎｂ合金的断裂特征和断口形貌已进行了较多的研究［“］．在３００ｏＣ的氢气中该合金能发生氢致开裂，其断口形貌与过载断口...