| Formation Process of an LDHs Coating on Magnesium Alloy by a CO2 Pressurization Method | |
| Zhang, Xiaochen1,2; Wang, Jiaoxiang3; Zhang, Chunyan4; Liu, Bin1; Jiang, Peng5; Zhao, Yang6; Buhe, Bateer2; Zhang, Tao6; Meng, Guozhe1; Wang, Fuhui6 | |
| Corresponding Author | Zhang, Tao(zhangtao@mail.neu.edu.cn) |
| 2019 | |
| Source Publication | COATINGS
 |
| ISSN | 2079-6412 |
| Volume | 9Issue:1Pages:15 |
| Abstract | The formation process of LDHs (layered double hydroxides) coating on magnesium alloy by the CO2 pressurization method was studied. The micro-structure was observed by OM, SEM and GAXRD. The weighted gain curve, apparent activation energy, and CO2 solubility curve were all calculated by equations. The potentiodynamic polarization curve, hydrogen evolution data, and immersion were analyzed by an electrochemical method. The results show that the LDHs coating was formed layer-by-layer. The formation positions were initially on the alpha-Mg phase, and then on the beta-Mg17Al12 phase. It was found to be the most compact after 30 min. The LDHs coating began to appear to have severe cracks and holes over time. The formation process of the LDHs coating can be divided into three stages: a rapid growth stage (0-10 min), slow growth stage (10-20 min), and periodic growth stage (30 min, 1 h). The apparent activation energies in each of the three stages are 21.78, 31.86 and 34.92 kJ mol(-1), respectively. The LDHs coating has a compact micro-structure and better anti-corrosion at a pressure of 3 MPa, a temperature of 50 degrees C and a time of 30 min. The CO2 pressurization promotes a formation reaction rate and achieves a high formation efficiency and good formation stability under the condition of zero pollution. |
| Keyword | magnesium alloy CO2 pressurization method LDHs coating formation process alpha-Mg phase beta-Mg(17)A(1)(2) phase micro-structure anti-corrosion property |
| Funding Organization | National Program for the Young Top-notch Professionals ; National Natural Science Foundation of China ; Foundation of Young Scholars in HLJIT |
| DOI | 10.3390/coatings9010047 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Program for the Young Top-notch Professionals ; National Natural Science Foundation of China[51531007] ; National Natural Science Foundation of China[51771050] ; National Natural Science Foundation of China[51705038] ; Foundation of Young Scholars in HLJIT[2014QJ12] |
| WOS Research Area | Materials Science |
| WOS Subject | Materials Science, Coatings & Films |
| WOS ID | WOS:000457786200047 |
| Publisher | MDPI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/131518 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zhang, Tao |
| Affiliation | 1.Harbin Engn Univ, Coll Mat Sci & Chem Engn, Harbin 150001, Heilongjiang, Peoples R China 2.Heilongjiang Inst Technol, Coll Mat Chem & Engn, Harbin 150050, Heilongjiang, Peoples R China 3.Avic Harbin Bearing Co LTD, Dept Res & Dev, Harbin 150000, Heilongjiang, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 5.Changzhou Univ, Sch Mech Engn, Changzhou 213164, Peoples R China 6.Northeastern Univ, Corros & Protect Div, Shenyang Natl Lab Mat Sci, Shenyang 110819, Liaoning, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang, Xiaochen,Wang, Jiaoxiang,Zhang, Chunyan,et al. Formation Process of an LDHs Coating on Magnesium Alloy by a CO2 Pressurization Method[J]. COATINGS,2019,9(1):15. |
| APA | Zhang, Xiaochen.,Wang, Jiaoxiang.,Zhang, Chunyan.,Liu, Bin.,Jiang, Peng.,...&Wang, Fuhui.(2019).Formation Process of an LDHs Coating on Magnesium Alloy by a CO2 Pressurization Method.COATINGS,9(1),15. |
| MLA | Zhang, Xiaochen,et al."Formation Process of an LDHs Coating on Magnesium Alloy by a CO2 Pressurization Method".COATINGS 9.1(2019):15. |
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