An approach to improve corrosion resistance in electro-galvanized Zn-Al composite coating by induced passivity

被引：3

作者：

Sahayata, Bhavyan ^{[1
]}

Mahanta, Sattwik Kumar ^{[1
]}

Upadhyay, Pundrikaksha ^{[1
]}

Mendon, Rajath R. ^{[1
]}

Basu, Anindya ^{[1
]}

Das, Sanjeev ^{[2
]}

Mallik, Archana ^{[1
]}

机构：

[1] Natl Inst Technol, Dept Met & Mat Engn, Electromet & Corros Lab, Rourkela 769008, Odisha, India

[2] Natl Inst Technol, Adv Met Casting Lab, Raipur 492010, Chhattisgarh, India

来源：

MATERIALS LETTERS | 2023年 / 351卷

关键词：

Electro-galvanization; Zn -Al composite; Coating; Corrosion; Passivity;

D O I：

10.1016/j.matlet.2023.135013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the current work, zinc and zinc-aluminum nano-composite was electro-galvanized onto mild steel at specified current densities from a sulfate bath. The incorporation of aluminum was found to enhance the corrosion resistance (0.0008 to 0.0003 mm/yr) as well as passivity of the deposits as compared to pure zinc deposition. Hence, attempts were made to analyze the effect of aluminum addition on the passive film and its protective nature by using several techniques including SEM, XRD, Mott-Schottky (MS), Electrochemical Impedance Spectroscopy. The results proved that the films were of protective nature and are of n-type semiconductor properties with adequate defect densities/charge carriers.

引用

页数：4

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