Electrochemical impedance study on the formation of biological iron phosphate layers

被引：28

作者：

Breur, HJA

de Wit, JHW

van Turnhout, J

Ferrari, GM

机构：

[1] TNO, Ind Technol, Dept Corros Prevent & Antifouling, NL-1780 AM Den Helder, Netherlands

[2] Delft Univ Technol, Dept Corros Technol & Electrochem, Delft, Netherlands

[3] Delft Univ Technol, Dept Polymer Mat & Engn, Delft, Netherlands

来源：

ELECTROCHIMICA ACTA | 2002年 / 47卷 / 13-14期

关键词：

phosphating; Pseudomonas putida; bacteria; bioprotection; EIS; corrosion protection;

D O I：

10.1016/S0013-4686(02)00096-8

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 [应用化学];

摘要：

Phosphating is the most commonly applied pre-treatment process. However, some disadvantages exist: heavy metals and phosphoric acid are used in the process. Volkland et al. developed a process, in which these compounds can be left out, using bacteria to activate the phosphating process. This paper addresses the analysis of this phosphating process using electrochemical impedance spectroscopy. EIS-measurements are carried out during 150 h to understand the electrochemical processes taking place during the phosphate formation. A model is derived that can explain the processes. The process appears to be a two-step adsorption process. The first step is formation of a thin layer of bacterial products. Formation of a dense layer of iron phosphates as a second step takes place within 2 days. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：2289 / 2295

页数：7