In-situ growth and anticorrosion mechanism of a bilayer CaCO3/MgO coating via rapid electrochemical deposition on AZ41 Mg alloy concrete formwork
An anticorrosive CaCO3/MgO coating was obtained on AZ41 Mg alloy via rapid electrochemical deposition for the application of concrete formwork. Surface characterizations were carried out to obtain the morphology and chemical composition of the coating. Afterwards, long-term anticorrosion performance...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-07-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423016393 |
| _version_ | 1797745186442313728 |
|---|---|
| author | Ye Wang Wenxin Xiao Kai Ma Chaoneng Dai Danqian Wang Jingfeng Wang |
| author_facet | Ye Wang Wenxin Xiao Kai Ma Chaoneng Dai Danqian Wang Jingfeng Wang |
| author_sort | Ye Wang |
| collection | DOAJ |
| description | An anticorrosive CaCO3/MgO coating was obtained on AZ41 Mg alloy via rapid electrochemical deposition for the application of concrete formwork. Surface characterizations were carried out to obtain the morphology and chemical composition of the coating. Afterwards, long-term anticorrosion performance was investigated via electrochemical methods in the chloride-containing Portland cement system. Results show that the electrochemical deposited coating consists of an outer CaCO3 layer and a compact inner MgO layer. Pre-immersion in the electrochemical deposition electrolyte contributed to the formation of a dense coating. The pretreatment plays an active role in the formation of an inner MgO layer, which significantly enhanced the binding between outer CaCO3 layer and Mg substrate. The electrochemical deposited CaCO3/MgO coating with pretreatment shows improved anticorrosion property than the coating without pretreatment, which could be ascribed to the formation of the dual-layer structure. Additionally, corrosion mechanism is suggested and discussed for the CaCO3/MgO coating. |
| first_indexed | 2024-03-12T15:19:46Z |
| format | Article |
| id | doaj.art-50c2e3f34d3e4b9483302f776b578c87 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-12T15:19:46Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-50c2e3f34d3e4b9483302f776b578c872023-08-11T05:34:34ZengElsevierJournal of Materials Research and Technology2238-78542023-07-012566286643In-situ growth and anticorrosion mechanism of a bilayer CaCO3/MgO coating via rapid electrochemical deposition on AZ41 Mg alloy concrete formworkYe Wang0Wenxin Xiao1Kai Ma2Chaoneng Dai3Danqian Wang4Jingfeng Wang5College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing 400045, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing 400045, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing 400045, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing 400045, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China; Corresponding author. College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China.College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China; Corresponding author. College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China.An anticorrosive CaCO3/MgO coating was obtained on AZ41 Mg alloy via rapid electrochemical deposition for the application of concrete formwork. Surface characterizations were carried out to obtain the morphology and chemical composition of the coating. Afterwards, long-term anticorrosion performance was investigated via electrochemical methods in the chloride-containing Portland cement system. Results show that the electrochemical deposited coating consists of an outer CaCO3 layer and a compact inner MgO layer. Pre-immersion in the electrochemical deposition electrolyte contributed to the formation of a dense coating. The pretreatment plays an active role in the formation of an inner MgO layer, which significantly enhanced the binding between outer CaCO3 layer and Mg substrate. The electrochemical deposited CaCO3/MgO coating with pretreatment shows improved anticorrosion property than the coating without pretreatment, which could be ascribed to the formation of the dual-layer structure. Additionally, corrosion mechanism is suggested and discussed for the CaCO3/MgO coating.http://www.sciencedirect.com/science/article/pii/S2238785423016393Mg concrete formworkRapid electrochemical depositionCalcium carbonateCorrosion protection |
| spellingShingle | Ye Wang Wenxin Xiao Kai Ma Chaoneng Dai Danqian Wang Jingfeng Wang In-situ growth and anticorrosion mechanism of a bilayer CaCO3/MgO coating via rapid electrochemical deposition on AZ41 Mg alloy concrete formwork Journal of Materials Research and Technology Mg concrete formwork Rapid electrochemical deposition Calcium carbonate Corrosion protection |
| title | In-situ growth and anticorrosion mechanism of a bilayer CaCO3/MgO coating via rapid electrochemical deposition on AZ41 Mg alloy concrete formwork |
| title_full | In-situ growth and anticorrosion mechanism of a bilayer CaCO3/MgO coating via rapid electrochemical deposition on AZ41 Mg alloy concrete formwork |
| title_fullStr | In-situ growth and anticorrosion mechanism of a bilayer CaCO3/MgO coating via rapid electrochemical deposition on AZ41 Mg alloy concrete formwork |
| title_full_unstemmed | In-situ growth and anticorrosion mechanism of a bilayer CaCO3/MgO coating via rapid electrochemical deposition on AZ41 Mg alloy concrete formwork |
| title_short | In-situ growth and anticorrosion mechanism of a bilayer CaCO3/MgO coating via rapid electrochemical deposition on AZ41 Mg alloy concrete formwork |
| title_sort | in situ growth and anticorrosion mechanism of a bilayer caco3 mgo coating via rapid electrochemical deposition on az41 mg alloy concrete formwork |
| topic | Mg concrete formwork Rapid electrochemical deposition Calcium carbonate Corrosion protection |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423016393 |
| work_keys_str_mv | AT yewang insitugrowthandanticorrosionmechanismofabilayercaco3mgocoatingviarapidelectrochemicaldepositiononaz41mgalloyconcreteformwork AT wenxinxiao insitugrowthandanticorrosionmechanismofabilayercaco3mgocoatingviarapidelectrochemicaldepositiononaz41mgalloyconcreteformwork AT kaima insitugrowthandanticorrosionmechanismofabilayercaco3mgocoatingviarapidelectrochemicaldepositiononaz41mgalloyconcreteformwork AT chaonengdai insitugrowthandanticorrosionmechanismofabilayercaco3mgocoatingviarapidelectrochemicaldepositiononaz41mgalloyconcreteformwork AT danqianwang insitugrowthandanticorrosionmechanismofabilayercaco3mgocoatingviarapidelectrochemicaldepositiononaz41mgalloyconcreteformwork AT jingfengwang insitugrowthandanticorrosionmechanismofabilayercaco3mgocoatingviarapidelectrochemicaldepositiononaz41mgalloyconcreteformwork |