Effects of the Combined Addition of Zn and Mg on Corrosion Behaviors of Electropainted AlSi-Based Metallic Coatings Used for Hot-Stamping Steel Sheets

The effects of the combined addition of Zn and Mg on the corrosion resistance of AlSi-based coating for automotive steel sheets were investigated using a variety of analytical and electrochemical techniques. The preferential dissolution of Mg and Zn from MgZn<sub>2</sub>/Mg<sub>2&l...

Full description

Bibliographic Details
Main Authors:	Si On Kim, Won Seog Yang, Sung Jin Kim
Format:	Article
Language:	English
Published:	MDPI AG 2020-07-01
Series:	Materials
Subjects:	hot stamping steel AlSi-based coating electrodeposited paint Zn Mg corrosion
Online Access:	https://www.mdpi.com/1996-1944/13/15/3379

id	doaj-4b79e21cc2254754802692104d142c58
record_format	Article
spelling	doaj-4b79e21cc2254754802692104d142c582020-11-25T03:12:46ZengMDPI AGMaterials1996-19442020-07-01133379337910.3390/ma13153379Effects of the Combined Addition of Zn and Mg on Corrosion Behaviors of Electropainted AlSi-Based Metallic Coatings Used for Hot-Stamping Steel SheetsSi On Kim0Won Seog Yang1Sung Jin Kim2Department of Advanced Materials Engineering, Sunchon National University, Jungang-ro, Suncheon, Jeonnam 57922, KoreaR&D Division, Hyundai Steel, 1480 Bukbusaneop-ro, Songak-eup, Dangjin, Chungnam 31719, KoreaDepartment of Advanced Materials Engineering, Sunchon National University, Jungang-ro, Suncheon, Jeonnam 57922, KoreaThe effects of the combined addition of Zn and Mg on the corrosion resistance of AlSi-based coating for automotive steel sheets were investigated using a variety of analytical and electrochemical techniques. The preferential dissolution of Mg and Zn from MgZn<sub>2</sub>/Mg<sub>2</sub>Si phases occurred on the AlSi-based coating that had been alloyed with a smaller portion of Zn and Mg, which contributed to the rapid surface coverage by corrosion products with a protective nature, reducing the corrosion current density. On the other hand, localized corrosion attacks caused by the selective dissolution of Mg were also observed in the AlSi-based coating with a smaller portion of Zn and Mg. Such alloying can also worsen its corrosion resistance when coated additionally with electrodeposited paint. The mechanistic reasons for these conflicting results are also discussed.https://www.mdpi.com/1996-1944/13/15/3379hot stamping steelAlSi-based coatingelectrodeposited paintZnMgcorrosion
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Si On Kim Won Seog Yang Sung Jin Kim
spellingShingle	Si On Kim Won Seog Yang Sung Jin Kim Effects of the Combined Addition of Zn and Mg on Corrosion Behaviors of Electropainted AlSi-Based Metallic Coatings Used for Hot-Stamping Steel Sheets Materials hot stamping steel AlSi-based coating electrodeposited paint Zn Mg corrosion
author_facet	Si On Kim Won Seog Yang Sung Jin Kim
author_sort	Si On Kim
title	Effects of the Combined Addition of Zn and Mg on Corrosion Behaviors of Electropainted AlSi-Based Metallic Coatings Used for Hot-Stamping Steel Sheets
title_short	Effects of the Combined Addition of Zn and Mg on Corrosion Behaviors of Electropainted AlSi-Based Metallic Coatings Used for Hot-Stamping Steel Sheets
title_full	Effects of the Combined Addition of Zn and Mg on Corrosion Behaviors of Electropainted AlSi-Based Metallic Coatings Used for Hot-Stamping Steel Sheets
title_fullStr	Effects of the Combined Addition of Zn and Mg on Corrosion Behaviors of Electropainted AlSi-Based Metallic Coatings Used for Hot-Stamping Steel Sheets
title_full_unstemmed	Effects of the Combined Addition of Zn and Mg on Corrosion Behaviors of Electropainted AlSi-Based Metallic Coatings Used for Hot-Stamping Steel Sheets
title_sort	effects of the combined addition of zn and mg on corrosion behaviors of electropainted alsi-based metallic coatings used for hot-stamping steel sheets
publisher	MDPI AG
series	Materials
issn	1996-1944
publishDate	2020-07-01
description	The effects of the combined addition of Zn and Mg on the corrosion resistance of AlSi-based coating for automotive steel sheets were investigated using a variety of analytical and electrochemical techniques. The preferential dissolution of Mg and Zn from MgZn<sub>2</sub>/Mg<sub>2</sub>Si phases occurred on the AlSi-based coating that had been alloyed with a smaller portion of Zn and Mg, which contributed to the rapid surface coverage by corrosion products with a protective nature, reducing the corrosion current density. On the other hand, localized corrosion attacks caused by the selective dissolution of Mg were also observed in the AlSi-based coating with a smaller portion of Zn and Mg. Such alloying can also worsen its corrosion resistance when coated additionally with electrodeposited paint. The mechanistic reasons for these conflicting results are also discussed.
topic	hot stamping steel AlSi-based coating electrodeposited paint Zn Mg corrosion
url	https://www.mdpi.com/1996-1944/13/15/3379
work_keys_str_mv	AT sionkim effectsofthecombinedadditionofznandmgoncorrosionbehaviorsofelectropaintedalsibasedmetalliccoatingsusedforhotstampingsteelsheets AT wonseogyang effectsofthecombinedadditionofznandmgoncorrosionbehaviorsofelectropaintedalsibasedmetalliccoatingsusedforhotstampingsteelsheets AT sungjinkim effectsofthecombinedadditionofznandmgoncorrosionbehaviorsofelectropaintedalsibasedmetalliccoatingsusedforhotstampingsteelsheets
_version_	1724648583485980672

Effects of the Combined Addition of Zn and Mg on Corrosion Behaviors of Electropainted AlSi-Based Metallic Coatings Used for Hot-Stamping Steel Sheets

Similar Items