IMPROVEMENT OF THE CORROSION BEHAVIOR OF ALUMINUM ALLOY 6061-T6 WITH YTTRIUM AND LANTHANUM CONVERSION COATINGS

被引：2

作者：

Bekhiti, Djillali ^{[1
]}

Creus, Juan ^{[2
]}

Mesrati, Nadir ^{[3
]}

Abdi, Abderrezak ^{[1
]}

Messaoudi, Hiba ^{[4
]}

机构：

[1] Polytech Mil Sch, BP17, Algiers 1611, Algeria

[2] Univ La Rochelle, Lab Engn Sci Environm, UMR CNRS 7356, La Rochelle, France

[3] Polytech Algiers, Natl High Sch, Algiers 1611, Algeria

[4] Univ 20 August 1955 Skikda, Fac Sci, Dept Chem, Skikda, Algeria

来源：

MATERIALI IN TEHNOLOGIJE | 2018年 / 52卷 / 03期

关键词：

aluminum alloy; 6061-T6; conversion coating; rare earth elements; lanthanum; yttrium; ELECTRODEPOSITION; RESISTANCE; AA2024-T3;

D O I：

10.17222/mit.2017.160

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, yttrium- and lanthanum-based conversion coatings were deposited on a 6061-T6 aluminum alloy with cathodic electrochemical deposition using Y- and La-nitrate precursors. The optimum [La3+]/[Y3+] ratio was evaluated with cyclic-voltammetry (CV) curves. The influence of the conversion-treatment time was studied by performing the experiment for periods of 10 and 20 minutes. Optical microscopy was used to determine the coating morphology and the anticorrosive properties were studied using linear polarization (LP) and electrochemical impedance spectroscopy (EIS) in a 5-g/L NaCl solution. The electrochemical results revealed an obvious improvement in the corrosion resistance against the aggressive media after an extended imersion test for 48 h. indicating a good efficiency of the Y- and La-conversion coating.

引用

页码：329 / 334

页数：6

共 26 条

[1] Investigation on structural, morphological, and electrochemical properties of mesoporous cobalt oxide-infiltrated NaY zeolite [J].