Investigation of the Localized Corrosion and Passive Behavior of Type 304 Stainless Steels with 0.2–1.8 wt % B

The pitting corrosion resistance and passive behavior of type 304 borated stainless steels (Fe<sub>balance</sub>–18Cr–12Ni–1.5Mn–(0.19, 0.78, and 1.76 wt %)B) manufactured through conventional ingot metallurgy were investigated. The alloys were composed of an austenitic matrix and Cr<...

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Main Authors:	Heon-Young Ha, Jae Hoon Jang, Tae-Ho Lee, Chihyoung Won, Chang-Hoon Lee, Joonoh Moon, Chang-Geun Lee
Format:	Article
Language:	English
Published:	MDPI AG 2018-10-01
Series:	Materials
Subjects:	borated stainless steels pitting corrosion passive film
Online Access:	https://www.mdpi.com/1996-1944/11/11/2097

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spelling	doaj-14f7012d33dc4607a261772e690e8d792020-11-24T21:45:45ZengMDPI AGMaterials1996-19442018-10-011111209710.3390/ma11112097ma11112097Investigation of the Localized Corrosion and Passive Behavior of Type 304 Stainless Steels with 0.2–1.8 wt % BHeon-Young Ha0Jae Hoon Jang1Tae-Ho Lee2Chihyoung Won3Chang-Hoon Lee4Joonoh Moon5Chang-Geun Lee6Ferrous Alloy Department, Korea Institute of Materials Science, Changwon 51508, KoreaFerrous Alloy Department, Korea Institute of Materials Science, Changwon 51508, KoreaFerrous Alloy Department, Korea Institute of Materials Science, Changwon 51508, KoreaFerrous Alloy Department, Korea Institute of Materials Science, Changwon 51508, KoreaFerrous Alloy Department, Korea Institute of Materials Science, Changwon 51508, KoreaFerrous Alloy Department, Korea Institute of Materials Science, Changwon 51508, KoreaFerrous Alloy Department, Korea Institute of Materials Science, Changwon 51508, KoreaThe pitting corrosion resistance and passive behavior of type 304 borated stainless steels (Fe<sub>balance</sub>–18Cr–12Ni–1.5Mn–(0.19, 0.78, and 1.76 wt %)B) manufactured through conventional ingot metallurgy were investigated. The alloys were composed of an austenitic matrix and Cr<sub>2</sub>B phase, and the volume fraction of Cr<sub>2</sub>B increased from 1.68 to 22.66 vol % as the B content increased from 0.19 to 1.76 wt %. Potentiodynamic polarization tests measured in aqueous NaCl solutions revealed that the pitting corrosion resistance was reduced as the B content increased and the pits were initiated at the matrix adjacent to the Cr<sub>2</sub>B phase. It was found that the reduced resistance to pitting corrosion by B addition was due to the formation of more defective and thinner passive film and increased pit initiation sites in the matrix.https://www.mdpi.com/1996-1944/11/11/2097borated stainless steelspitting corrosionpassive film
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Heon-Young Ha Jae Hoon Jang Tae-Ho Lee Chihyoung Won Chang-Hoon Lee Joonoh Moon Chang-Geun Lee
spellingShingle	Heon-Young Ha Jae Hoon Jang Tae-Ho Lee Chihyoung Won Chang-Hoon Lee Joonoh Moon Chang-Geun Lee Investigation of the Localized Corrosion and Passive Behavior of Type 304 Stainless Steels with 0.2–1.8 wt % B Materials borated stainless steels pitting corrosion passive film
author_facet	Heon-Young Ha Jae Hoon Jang Tae-Ho Lee Chihyoung Won Chang-Hoon Lee Joonoh Moon Chang-Geun Lee
author_sort	Heon-Young Ha
title	Investigation of the Localized Corrosion and Passive Behavior of Type 304 Stainless Steels with 0.2–1.8 wt % B
title_short	Investigation of the Localized Corrosion and Passive Behavior of Type 304 Stainless Steels with 0.2–1.8 wt % B
title_full	Investigation of the Localized Corrosion and Passive Behavior of Type 304 Stainless Steels with 0.2–1.8 wt % B
title_fullStr	Investigation of the Localized Corrosion and Passive Behavior of Type 304 Stainless Steels with 0.2–1.8 wt % B
title_full_unstemmed	Investigation of the Localized Corrosion and Passive Behavior of Type 304 Stainless Steels with 0.2–1.8 wt % B
title_sort	investigation of the localized corrosion and passive behavior of type 304 stainless steels with 0.2–1.8 wt % b
publisher	MDPI AG
series	Materials
issn	1996-1944
publishDate	2018-10-01
description	The pitting corrosion resistance and passive behavior of type 304 borated stainless steels (Fe<sub>balance</sub>–18Cr–12Ni–1.5Mn–(0.19, 0.78, and 1.76 wt %)B) manufactured through conventional ingot metallurgy were investigated. The alloys were composed of an austenitic matrix and Cr<sub>2</sub>B phase, and the volume fraction of Cr<sub>2</sub>B increased from 1.68 to 22.66 vol % as the B content increased from 0.19 to 1.76 wt %. Potentiodynamic polarization tests measured in aqueous NaCl solutions revealed that the pitting corrosion resistance was reduced as the B content increased and the pits were initiated at the matrix adjacent to the Cr<sub>2</sub>B phase. It was found that the reduced resistance to pitting corrosion by B addition was due to the formation of more defective and thinner passive film and increased pit initiation sites in the matrix.
topic	borated stainless steels pitting corrosion passive film
url	https://www.mdpi.com/1996-1944/11/11/2097
work_keys_str_mv	AT heonyoungha investigationofthelocalizedcorrosionandpassivebehavioroftype304stainlesssteelswith0218wtb AT jaehoonjang investigationofthelocalizedcorrosionandpassivebehavioroftype304stainlesssteelswith0218wtb AT taeholee investigationofthelocalizedcorrosionandpassivebehavioroftype304stainlesssteelswith0218wtb AT chihyoungwon investigationofthelocalizedcorrosionandpassivebehavioroftype304stainlesssteelswith0218wtb AT changhoonlee investigationofthelocalizedcorrosionandpassivebehavioroftype304stainlesssteelswith0218wtb AT joonohmoon investigationofthelocalizedcorrosionandpassivebehavioroftype304stainlesssteelswith0218wtb AT changgeunlee investigationofthelocalizedcorrosionandpassivebehavioroftype304stainlesssteelswith0218wtb
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Investigation of the Localized Corrosion and Passive Behavior of Type 304 Stainless Steels with 0.2–1.8 wt % B

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