AZ31B镁合金表面锌系磷化膜制备工艺及性能研究

材料工程, 2009, (9): 51-65. doi: 10.3969/j.issn.1001-4381.2009.09.013

AZ31B镁合金表面锌系磷化膜制备工艺及性能研究

高焕方 ^1, , 张胜涛 ^2, , 罗天元 ^3, , 全学军 ^4, , 许俊强 ^5, , 方丽 ^6,

1.重庆大学,化学与化工学院,重庆,400030;重庆理工大学,化学与生物工程学院,重庆,400050

2.重庆大学,化学与化工学院,重庆,400030

3.国防科技工业自然环境试验研究中心,重庆,400039

4.重庆理工大学,化学与生物工程学院,重庆,400050

5.重庆理工大学,化学与生物工程学院,重庆,400050

6.重庆理工大学,化学与生物工程学院,重庆,400050

关键词：磷化 , 镁合金 , 防腐 , 反应机理

Phosphate Process and Performance of Zinc Phosphate Coating on AZ31B Magnesium Alloy

采用极化曲线分析方法(Tafel)及扫描电子显微镜(SEM)对AZ31B镁合金在不同磷化时间及不同磷化温度条件下所形成的锌系磷化膜的防腐性能及表面微观形貌进行了研究,并应用X射线衍射仪(XRD)、能谱仪(EDS)对最佳工艺条件下所形成的磷化膜的相组成以及磷化膜的成分进行了研究.结果表明:磷化时间及磷化温度对AZ31B镁合金磷化膜的防腐性能有较大影响,其最佳磷化时间为5min,最佳磷化温度为50℃;磷化膜的成分为Zn3(PO4)2·4H2O,Zn2Mg(PO4)2以及少量的单质Zn;在锌系磷化液中AZ31B镁合金中的Mg在微阳极发生溶解而Al没有溶解.此外还探讨了AZ31B镁合金表面的磷化反应机理.

参考文献

[1]	Sathiyanarayanan S;Azim SS;Venkatachari G .Corrosion resistant properties of polyaniline-acrylic coating on magnesium alloy[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2006(4):2113-2117.
[2]	S. Jegannathan;T. S. N. Sankara Narayanan;K. Ravichandran;S. Rajeswari .Performance of zinc phosphate coatings obtained by cathodic electrochemical treatment in accelerated corrosion tests[J].Electrochimica Acta,2005(2):247-256.
[3]	Chong KZ.;Shih TS. .Conversion-coating treatment for magnesium alloys by a permanganate-phosphate solution[J].Materials Chemistry and Physics,2003(1):191-200.
[4]	Wanqiu Zhou;Dayong Shan;En-Hou Han;Wei Ke .Structure and formation mechanism of phosphate conversion coating on die-cast AZ91D magnesium alloy[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2008(2):329-337.
[5]	Li GY;Lian JS;Niu LY;Jiang ZH;Jiang Q .Growth of zinc phosphate coatings on AZ91D magnesium alloy[J].Surface & Coatings Technology,2006(3/4):1814-1820.
[6]	Kouisni L;Azzi M;Zertoubi M;Dalard F;Maximovitch S .Phosphate coatings on magnesium alloy AM60 part 1: study of the formation and the growth of zinc phosphate films[J].Surface & Coatings Technology,2004(1):58-67.
[7]	NIU Li-yuan,LI Guang-yu,JIANG Zhong-hao,SUN Li-ping,HAN Dong,LIAN Jian-she.Influence of sodium metanitrobenzene sulphonate on structures and surface morphologies of phosphate coating on AZ91D[J].中国有色金属学会会刊（英文版）,2006(03):567-571.
[8]	Niu LY;Jiang ZH;Li GY;Gu CD;Lian JS .A study and application of zinc phosphate coating on AZ91D magnesium alloy[J].Surface & Coatings Technology,2006(9):3021-3026.
[9]	CHENG Ying-liang,WU Hai-lan,CHEN Zhen-hua,WANG Hui-min,LI Ling-ling.Phosphating process of AZ31 magnesium alloy and corrosion resistance of coatings[J].中国有色金属学会会刊（英文版）,2006(05):1086-1091.

上一张下一张

计量

下载量()
访问量()

作者相关

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网