ELECTROCHEMICAL RECOVERY OF ZINC PRESENT IN THE SPENT PICKLING BATHS COMING FROM HOT DIP GALVANIZING PROCESSES

被引：0

作者：

Perez-Herranz, Valentin ^{[1
]}

Carrillo-Abad, Jordi ^{[1
]}

Garcia-Gabaldon, Montserrat ^{[1
]}

Ortega, Emma ^{[1
]}

机构：

[1] Univ Politecn Valencia, IEC Grp, Depto Ingn Quim & Nucl, Valencia 46022, Spain

来源：

TMS 2012 141ST ANNUAL MEETING & EXHIBITION - SUPPLEMENTAL PROCEEDINGS, VOL 1: MATERIALS PROCESSING AND INTERFACES | 2012年

关键词：

Electrochemical deposition; Iron; Hydrogen evolution reaction; Pickling solutions; Zinc electrodeposition; MINIMIZATION; CORROSION; ZN;

D O I：

暂无

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Hot dip galvanizing processes offer a simple and effective method for corrosion protection of steel. In this process, during the pickling step, HCl reacts with iron and iron oxides. Spent pickling baths contain hydrochloric acid, ZnCl2 and FeCl2 as principal compounds. Due to the inadequate existing techniques to treat the spent pickling solutions, the decrease of natural reserves of non-ferrous metals and the requirement of environmental protection, in the present work, the cathodic electrodeposition of zinc present in the spent pickling baths coming from hot dip galvanizing industries is studied. As the electrode potential was shifted towards more negative values, the fractional conversion increased. Simultaneously, the specific energy consumption decreased initially due to the increase in the zinc conversion rate but decreased for the most cathodic potential value due to hydrogen evolution reaction. Even though iron deposition does not take place for any experimental condition under study.

引用

页码：149 / 156

页数：8

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