The effects of pH and polyethylene glycol on the Cr(III) solution chemistry and electrodeposition of chromium

被引：58

作者：

Phuong, Nguyen Van ^{[1
,2
]}

Kwon, Sik Chol ^{[1
]}

Lee, Joo Yul ^{[1
]}

Lee, Jun Ho ^{[3
]}

Lee, Kyu Hwan ^{[1
,2
]}

机构：

[1] Korea Inst Mat Sci, Mat Proc Div, 531 Changwondaero, Chang Won 642831, Gyeongnam, South Korea

[2] Univ Sci & Technol, Taejon 305350, South Korea

[3] Changwon Natl Univ, Syst Engn Management Res Inst, Chang Won 641773, South Korea

来源：

SURFACE & COATINGS TECHNOLOGY | 2012年 / 206卷 / 21期

关键词：

Trivalent chromium; Polyethylene glycol; Organic additives; Electrodeposition; C ALLOY COATINGS; TRIVALENT CHROMIUM; ELECTROCHEMICAL-BEHAVIOR; ZINC ELECTRODEPOSITION; SULFATE ELECTROLYTES; MECHANISM; POLARIZATION; DEPOSITION; REDUCTION; NICKEL;

D O I：

10.1016/j.surfcoat.2012.04.025

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of pH and the organic additive, polyethylene glycol (PEG), on the trivalent chromium electroplating were investigated in view of the solution stability, electrochemical reactions and the properties of deposited layer. It was sought out that the concentration of chromic complexes in the chromic bath with formic acid was closely dependent on pH. The chromic complex formation in the bath, examined by theoretical calculation and UV-vis absorption measurement, was not affected by PEG addition. However, adsorbed PEG molecules on the cathode surface caused the hydrogen evolution rate to be retarded and the deposited coating morphology smooth, small cracks and nodular structure. The variations of solution acidity and organic additive concentration affected the complex formation, the cathodic reaction and the physical property of the deposit. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：4349 / 4355

页数：7

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