The corrosion of chromium based coatings for packaging steel

被引：24
|
作者：
Wint, N. [1 ]
de Vooys, A. C. A. [2 ]
McMurray, H. N. [1 ]
机构：
[1] Swansea Univ, Coll Engn, Mat Res Ctr, Bay Campus,Fabian Way, Swansea SA1 8EN, W Glam, Wales
[2] Tata Steel, POB 10-000, NL-1970 CA Ijmuiden, Netherlands
来源：
ELECTROCHIMICA ACTA | 2016年 / 203卷
关键词：
Chromium; Packaging; Organic coatings; Steel; Atmospheric corrosion; OXYGEN PARTIAL-PRESSURE; FILIFORM CORROSION; POLYMERIC COATINGS; PART; DELAMINATION; MECHANISM; ZINC; FILMS; IRON; KELVINPROBE;
D O I：
10.1016/j.electacta.2016.01.100
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Chromium/chromium oxide based coatings, cathodically electrodeposited from either Cr (VI) or Cr (III) containing electrolytes are compared with respect to their ability to resist the corrosion driven delamination of an adherent polymer overcoat. Cathodic disbondment rates are determined using an in situ scanning Kelvin probe technique. Anodic disbondment (filiform corrosion, FFC) rates are determined optically. The Cr (VI) derived coatings were fully resistant to corrosion driven disbondment. The Cr (III) derived coatings exhibited measurable rates of both FFC and cathodic disbondment. Disbondment kinetics are explained in relation to coating morphology, porosity and chemical composition determined using a combination of scanning electron microscopy (SEM), transmission electron microscopy (TEM) and xray photoelectron spectroscopy (XPS). (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：326 / 336
页数：11
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