Corrosion Behavior and Morphology of Passive Films Modified with Zinc–Aluminum Simultaneous Treatment on Different Metals
Passive films were formed on A508-3 steel (A508-3), 304L stainless steel (304L) and Incoloy 800 (In800) with blank/zinc/zinc–aluminum treatments in air at 300 °C. The electrochemical corrosion behaviors of different metals were investigated through potentiodynamic polarization, electrochemical imped...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2020-07-01
|
Series: | Metals |
Subjects: | |
Online Access: | https://www.mdpi.com/2075-4701/10/8/986 |
id |
doaj-654478816bc44cdeb1e2ac434013346d |
---|---|
record_format |
Article |
spelling |
doaj-654478816bc44cdeb1e2ac434013346d2020-11-25T03:02:39ZengMDPI AGMetals2075-47012020-07-011098698610.3390/met10080986Corrosion Behavior and Morphology of Passive Films Modified with Zinc–Aluminum Simultaneous Treatment on Different MetalsShenghan Zhang0Chenhao Sun1Jie Di2Yu Tan3Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environment Science and Engineering, North China Electric Power University, Baoding 071003, ChinaHebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environment Science and Engineering, North China Electric Power University, Baoding 071003, ChinaHebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environment Science and Engineering, North China Electric Power University, Baoding 071003, ChinaHebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environment Science and Engineering, North China Electric Power University, Baoding 071003, ChinaPassive films were formed on A508-3 steel (A508-3), 304L stainless steel (304L) and Incoloy 800 (In800) with blank/zinc/zinc–aluminum treatments in air at 300 °C. The electrochemical corrosion behaviors of different metals were investigated through potentiodynamic polarization, electrochemical impedance spectroscopy and the Mott–Schottky technique. The morphology and composition of passive films were analyzed using scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The zinc–aluminum treatment effectively reduced the corrosion current and increased the impedance of A508-3 and 304L, but had a weak effect on In800. The zinc–aluminum treatment reduced the carrier concentration of A508-3 and changed the semiconductor property of 304L and In800. The order of zinc–aluminum treatment for improving the corrosion resistance of three metals was: A508-3 > 304L > In800. In addition, the zinc–aluminum treatment enhanced the density and smoothness of passive films. According to the composition analysis, spinel ZnAl<sub>2</sub>O<sub>4</sub> was formed on three metals; however, the amount of spinel varied with the content of nickel and chromium in different metals, which affected the results of using this technology.https://www.mdpi.com/2075-4701/10/8/986zinc–aluminum treatmentpassive filmelectrochemicalmorphologyEDS |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Shenghan Zhang Chenhao Sun Jie Di Yu Tan |
spellingShingle |
Shenghan Zhang Chenhao Sun Jie Di Yu Tan Corrosion Behavior and Morphology of Passive Films Modified with Zinc–Aluminum Simultaneous Treatment on Different Metals Metals zinc–aluminum treatment passive film electrochemical morphology EDS |
author_facet |
Shenghan Zhang Chenhao Sun Jie Di Yu Tan |
author_sort |
Shenghan Zhang |
title |
Corrosion Behavior and Morphology of Passive Films Modified with Zinc–Aluminum Simultaneous Treatment on Different Metals |
title_short |
Corrosion Behavior and Morphology of Passive Films Modified with Zinc–Aluminum Simultaneous Treatment on Different Metals |
title_full |
Corrosion Behavior and Morphology of Passive Films Modified with Zinc–Aluminum Simultaneous Treatment on Different Metals |
title_fullStr |
Corrosion Behavior and Morphology of Passive Films Modified with Zinc–Aluminum Simultaneous Treatment on Different Metals |
title_full_unstemmed |
Corrosion Behavior and Morphology of Passive Films Modified with Zinc–Aluminum Simultaneous Treatment on Different Metals |
title_sort |
corrosion behavior and morphology of passive films modified with zinc–aluminum simultaneous treatment on different metals |
publisher |
MDPI AG |
series |
Metals |
issn |
2075-4701 |
publishDate |
2020-07-01 |
description |
Passive films were formed on A508-3 steel (A508-3), 304L stainless steel (304L) and Incoloy 800 (In800) with blank/zinc/zinc–aluminum treatments in air at 300 °C. The electrochemical corrosion behaviors of different metals were investigated through potentiodynamic polarization, electrochemical impedance spectroscopy and the Mott–Schottky technique. The morphology and composition of passive films were analyzed using scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The zinc–aluminum treatment effectively reduced the corrosion current and increased the impedance of A508-3 and 304L, but had a weak effect on In800. The zinc–aluminum treatment reduced the carrier concentration of A508-3 and changed the semiconductor property of 304L and In800. The order of zinc–aluminum treatment for improving the corrosion resistance of three metals was: A508-3 > 304L > In800. In addition, the zinc–aluminum treatment enhanced the density and smoothness of passive films. According to the composition analysis, spinel ZnAl<sub>2</sub>O<sub>4</sub> was formed on three metals; however, the amount of spinel varied with the content of nickel and chromium in different metals, which affected the results of using this technology. |
topic |
zinc–aluminum treatment passive film electrochemical morphology EDS |
url |
https://www.mdpi.com/2075-4701/10/8/986 |
work_keys_str_mv |
AT shenghanzhang corrosionbehaviorandmorphologyofpassivefilmsmodifiedwithzincaluminumsimultaneoustreatmentondifferentmetals AT chenhaosun corrosionbehaviorandmorphologyofpassivefilmsmodifiedwithzincaluminumsimultaneoustreatmentondifferentmetals AT jiedi corrosionbehaviorandmorphologyofpassivefilmsmodifiedwithzincaluminumsimultaneoustreatmentondifferentmetals AT yutan corrosionbehaviorandmorphologyofpassivefilmsmodifiedwithzincaluminumsimultaneoustreatmentondifferentmetals |
_version_ |
1724689079951425536 |