文章信息/Info

Title:

Recent Progress on the Surface Modification and Protection of Magnesium Alloys

文章編號(hào):

1674-3962(2020)02-0100-12

作者:

王悅存1; 周凡1; 葛延峰2; 周根樹1; 蔣百靈2; 單智偉1

（1. 西安交通大學(xué) 金屬強(qiáng)度國家重點(diǎn)實(shí)驗(yàn)室，陜西 西安 710049）（2. 西安理工大學(xué)材料科學(xué)與工程學(xué)院，陜西 西安 710048）

Author(s):

WANG Yuecun1;  ZHOU Fan1;  GE Yanfeng2;  ZHOU Genshu1;  JIANG Bailing2;  SHAN Zhiwei1

(1. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China) (2. Department of Materials Science and Engineering，Xi’an University of Technology, Xi’an 710048,China)

關(guān)鍵詞:

鎂合金; 腐蝕; 表面改性; 化學(xué)轉(zhuǎn)化; 微弧氧化; 活性CO2; 超疏水

Keywords:

Mg alloys;  corrosion;  surface modification;  chemical conversion;  micro�瞐rc oxidation;  the excited CO2;  super hydrophobicity

分類號(hào):

M207

DOI:

10.7502/j.issn.1674-3962.201909012

文獻(xiàn)標(biāo)志碼:

A

摘要:

鎂合金是最輕的金屬結(jié)構(gòu)材料，具有比強(qiáng)度高、比剛度高、導(dǎo)電導(dǎo)熱性好、生物相容性好等優(yōu)點(diǎn)，在汽車、航空航天、電子、生物醫(yī)學(xué)等領(lǐng)域有著廣闊的應(yīng)用前景。然而，鎂自身化學(xué)活性極高且其表面的原生氧化膜疏松多孔，無法有效保護(hù)基底，往往在各加工工序間就會(huì)發(fā)生表面腐蝕。嚴(yán)重的腐蝕問題已經(jīng)成為制約鎂及其合金應(yīng)用與發(fā)展的主要短板，因此，對(duì)鎂合金進(jìn)行表面防護(hù)處理是極為重要的。現(xiàn)階段，鎂合金的表面處理方法雖然種類繁多，但防護(hù)效果良莠不齊。重點(diǎn)綜述了兩種常用的鎂合金表面改性技術(shù)——化學(xué)轉(zhuǎn)化膜技術(shù)和微弧氧化技術(shù)的新進(jìn)展，并介紹了一種基于活性CO2處理提高鎂合金耐蝕性的新技術(shù)，以及仿生超疏水表面在提升鎂合金耐蝕性上的應(yīng)用，最后，對(duì)鎂合金表面改性與防護(hù)的未來發(fā)展方向進(jìn)行了展望。

Abstract:

Magnesium (Mg) alloys are the lightest structural metal material with high strength-to-weight ratio, good thermal (electrical) conductivity and biocompatibility, having broad application prospects in automotive, aerospace, electronics and biomedical industries. As advanced light metals, Mg alloys are promising to replace the traditional materials, however, Mg is too reactive, and its native oxide scale is porous and cannot protect the base metal from environmental corrosion effectively. The low corrosion resistance has severely reduced the competitiveness of Mg alloys, and limits their applications. To this end, the surface protection of Mg alloys is indispensable. At present, there have been many kinds of surface treatment methods, but their protection effects are different. Here, we focus on the recent progress of two frequently used technologies, the chemical conversion and micro-arc oxidation. A new method based on the excited CO2 for surface modification of Mg alloys and the biomimetic superhydrophobic surfaces for corrosion protection of Mg alloys are introduced as well. In the end, we discuss the future direction of the surface protection of Mg alloys.