The lineal Polarization Method for Corrosion Rate Measurement of Reinforcing Bar of Concrete in Situ

本文尝试用线性极化的方法对埋置于混凝土内部的钢筋的腐蚀速度进行测量 .自行设计了一组特殊结构的辅助电极 ,制备了不同尺寸和保护层厚度的混凝土试样 .通过改变辅助电极 ,调整电位的分布 ,使线性极化方法的测量误差降低到腐蚀速度测量允许的误差范围内 .确定了两种适用于混凝土中钢筋腐蚀速度测量的辅助电极 .A linear polarization method was applied to measure corrosion rate of reinforcing bar of concrete in situ. Generally in the experiment, the area and shape of the reinforcing bar as a working electrode can be changed and adjusted according to our needs. But polarization area cannot be defined when reinforcing bar is polarized in situ, so that a real R p can't be obtained. Thus the purpose of present work is to improve the measurement system. We used the double_ring auxiliary electrodes made by ourselves. The size of the double_ring auxiliary electrodes was adjusted repeatedly until the real polarization area was equivalent to one of the auxiliary electrodes. Using such an auxiliary electrode to measure R p, we obtained the result that the measurement error of R p is about 2.5%. This result can meet the need of measurement in situ.作者联系地址：山东工业大学化学工程系!山东济南250061,山东工业大学化学工程系!山东济南250061,山东工业大学化学工程系!山东济南250061,山东工业大学化学工程系!山东济南250061Author's Address: Department of Chemical Engineering, Shangdong University of Technology, Jinan 250061 Chin

The AC impedance Analysis for Pluse Oxide Film of Aluminium Alloy

本 文采用宽 频阻抗 法首次测 得了 铝合 金表 面 脉冲 氧化 膜 的 Ｂｏｄｅ 图 ．实 验表 明： 脉冲氧化膜 与直流 氧化膜的 主要差别 在于多 孔层，脉 冲氧化膜 比较 均匀， 基本 无缺 陷．通 过显 微观 察及 Ｖ Ｉ 特性 曲线等测 定手段， 进一步佐 证了交 流阻抗测 试的部分 结果．Bode diagrams for aluminum PC (abbreviated from pulse current) oxide films were first obtained by AC impedance measurements in a wide range of frequency.The experimental results show that different kinds of electrical equivalent circuits can be used for representing PC films and DC (abbreviated from direct current) oxide films separately,the main differences between them are their porous layers,the PC films are more even with little defects.Those are also verified by SEM and V I characteristic curve measurements.作者联系地址：山东工业大学化学工程系!济南250061,山东工业大学化学工程系!济南250061,山东工业大学化学工程系!济南250061Author's Address: Dept.of Chem.Eng.,Shangdong University of Technology Jinan 25006

低品位钾盐助剂焙烧与水浸及结晶制备钾盐

采用助剂焙烧-水洗浸出-钾盐结晶分离工艺从低品位钾长石中提取钾盐,分析了分解机理与浸出动力学.结果表明,加入复合助剂分解效果较好,在钾长石:氯化钙:碳酸钠=1:0.5:0.1(&omega;)、800℃焙烧4 h及液固比1 m L/g、80℃水洗2 h的条件下,钾提取率可达91.88%.使用CaCl_2-NaCO_3复合助剂能降低矿石分解温度,水洗浸出阶段主要受内扩散控制.</p

The preparation of flexible polymeric anode and the measurement of its protective ability for cathodic protection

应用乙烯基共聚物加导电填料制备可任意改变形状的柔性电极，对电极的电阻进行了测定．并在几种溶液中，以柔性电极为辅助阳极，对碳钢进行外加电流的阴极保护，测定了柔性电极的保护能力The flexible electrode,whose shape can be changed freely,was made of ethenyl copolymer and conductive component and proper amount of additive for cathodic protection.The resistance of electrode was measured.In low concentration of H 2SO 4,the flexible electrode can be used as auxiliary anode to protect the carbon steel.The protection ability of the flexible auxiliary anode was measured too.作者联系地址：山东工业大学化工系!济南250061,山东工业大学化工系!济南250061,山东工业大学化工系!济南250061,中国科学院海洋研究所!青岛266071Author's Address: Dep.of Chem.Eng.,Shandong Univ.of Tech.Jinan 250061 Ma Shide Inst.of Oceanology,Chinese Academy of Sci.Qingdao 26607