Effect of Al Hot-Dipping on High-Temperature Corrosion of Carbon Steel in N2/0.1% H2S Gas
High-temperature corrosion of carbon steel in N2/0.1% H2S mixed gas at 600–800 °C for 50–100 h was studied after hot-dipping in the aluminum molten bath. Hot-dipping resulted in the formation of the Al topcoat and the Al-Fe alloy layer firmly adhered on the substrate. The Al-Fe alloy layer consisted...
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| Format: | Article |
| Language: | English |
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MDPI AG
2016-02-01
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| Series: | Metals |
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| Online Access: | http://www.mdpi.com/2075-4701/6/2/38 |
| _version_ | 1811213396787331072 |
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| author | Muhammad Ali Abro Dong Bok Lee |
| author_facet | Muhammad Ali Abro Dong Bok Lee |
| author_sort | Muhammad Ali Abro |
| collection | DOAJ |
| description | High-temperature corrosion of carbon steel in N2/0.1% H2S mixed gas at 600–800 °C for 50–100 h was studied after hot-dipping in the aluminum molten bath. Hot-dipping resulted in the formation of the Al topcoat and the Al-Fe alloy layer firmly adhered on the substrate. The Al-Fe alloy layer consisted primarily of a wide, tongue-like Al5Fe2 layer and narrow Al3Fe layer. When corroded at 800 °C for 100 h, the Al topcoat partially oxidized to the protective but non-adherent α-Al2O3 layer, and the interdiffusion converted the Al-Fe alloy layer to an (Al13Fe4, AlFe3)-mixed layer. The interdiffusion also lowered the microhardness of the hot-dipped steel. The α-Al2O3 layer formed on the hot-dipped steel protected the carbon steel against corrosion. Without the Al hot-dipping, the carbon steel failed by forming a thick, fragile, and non-protective FeS scale. |
| first_indexed | 2024-04-12T05:45:03Z |
| format | Article |
| id | doaj.art-241d6a10e28a45a58a3bbfdb792c6fe8 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-04-12T05:45:03Z |
| publishDate | 2016-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-241d6a10e28a45a58a3bbfdb792c6fe82022-12-22T03:45:28ZengMDPI AGMetals2075-47012016-02-01623810.3390/met6020038met6020038Effect of Al Hot-Dipping on High-Temperature Corrosion of Carbon Steel in N2/0.1% H2S GasMuhammad Ali Abro0Dong Bok Lee1School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, KoreaSchool of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, KoreaHigh-temperature corrosion of carbon steel in N2/0.1% H2S mixed gas at 600–800 °C for 50–100 h was studied after hot-dipping in the aluminum molten bath. Hot-dipping resulted in the formation of the Al topcoat and the Al-Fe alloy layer firmly adhered on the substrate. The Al-Fe alloy layer consisted primarily of a wide, tongue-like Al5Fe2 layer and narrow Al3Fe layer. When corroded at 800 °C for 100 h, the Al topcoat partially oxidized to the protective but non-adherent α-Al2O3 layer, and the interdiffusion converted the Al-Fe alloy layer to an (Al13Fe4, AlFe3)-mixed layer. The interdiffusion also lowered the microhardness of the hot-dipped steel. The α-Al2O3 layer formed on the hot-dipped steel protected the carbon steel against corrosion. Without the Al hot-dipping, the carbon steel failed by forming a thick, fragile, and non-protective FeS scale.http://www.mdpi.com/2075-4701/6/2/38H2S corrosionhot-dip aluminizingcarbon steelmicrohardness |
| spellingShingle | Muhammad Ali Abro Dong Bok Lee Effect of Al Hot-Dipping on High-Temperature Corrosion of Carbon Steel in N2/0.1% H2S Gas Metals H2S corrosion hot-dip aluminizing carbon steel microhardness |
| title | Effect of Al Hot-Dipping on High-Temperature Corrosion of Carbon Steel in N2/0.1% H2S Gas |
| title_full | Effect of Al Hot-Dipping on High-Temperature Corrosion of Carbon Steel in N2/0.1% H2S Gas |
| title_fullStr | Effect of Al Hot-Dipping on High-Temperature Corrosion of Carbon Steel in N2/0.1% H2S Gas |
| title_full_unstemmed | Effect of Al Hot-Dipping on High-Temperature Corrosion of Carbon Steel in N2/0.1% H2S Gas |
| title_short | Effect of Al Hot-Dipping on High-Temperature Corrosion of Carbon Steel in N2/0.1% H2S Gas |
| title_sort | effect of al hot dipping on high temperature corrosion of carbon steel in n2 0 1 h2s gas |
| topic | H2S corrosion hot-dip aluminizing carbon steel microhardness |
| url | http://www.mdpi.com/2075-4701/6/2/38 |
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