XPS characterization and corrosion resistance of cerium-treated magnesium coatings

被引：19

作者：

Ben Hassen, Samia ^{[1
,3
]}

Bousselmi, Latifa ^{[2
]}

Bercot, Patrice ^{[3
]}

Rezrazi, El Mustafa ^{[3
]}

Triki, Ezzeddine ^{[1
]}

机构：

[1] ENIT, Unite Rech Corros & Protect Metall, Tunis, Tunisia

[2] CERTE, Lab Traitement & Recyclage Eaux, Borj Cedria, Tunisia

[3] Univ Franche Comte, CNRS UMR 6213, Inst UTINAM, F-25030 Besancon, France

来源：

RARE METALS | 2011年 / 30卷 / 04期

关键词：

cerium compounds; magnesium; coatings; X-ray photoelectron spectroscopy; corrosion resistance; CONVERSION COATINGS; AQUEOUS SYSTEMS; PHASE-STABILITY; PROTECTION; FILMS; SPECTROSCOPY; DIAGRAM; ALLOY; OXIDE;

D O I：

10.1007/s12598-011-0398-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cerium conversion treatment was applied on magnesium coatings in a solution containing CeCl3. The composition of the cerium conversion layer on magnesium was investigated using X-ray photoelectron spectroscopy (XPS). It was revealed that the composition predominately consisted of a three-valent state cerium compound with a relative abundance around 90%. Some of Ce3+ was oxidized to Ce4+. Electrochemical impedance spectroscopy results revealed that the total impedance of cerium-treated samples increased for a short immersion time in NaCl solution before coating deteriorating. This deterioration was due to the coating porosity increasing and the breakdown of the conversion layer.

引用

页码：368 / 373

页数：6

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