Study on the corrosion resistance of phytic acid conversion coating for magnesium alloys

被引：159
作者：
Liu Jianrui [1 ]
Guo Yina [1 ]
Huang Weidong [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
SURFACE & COATINGS TECHNOLOGY | 2006年 / 201卷 / 3-4期
基金：
中国国家自然科学基金;
关键词：
magnesium alloy; conversion treatment; phytic acid; corrosion resistance;
D O I：
10.1016/j.surfcoat.2006.02.020
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Chemical conversion treatment is a basic method to improve the corrosion resistance of magnesium and its alloys. In the method of conventional conversion, however, the solution contains hexavalent chromium compounds which are harmful to the environment. The replacement surface treatment has been strongly emphasized in recent years. A chemical conversion treatment solution containing phytic was developed in this study for magnesium alloys. The surface conversion coating was characterized by SEM and EDS. The factors of influence to the corrosion resistance of conversion coating were discussed through hydrogen evolution method and polarization potential. The corrosion resistance of phytic acid conversion coating was comparable with the chromate containing. The experimental results indicate that the phytic acid conversion coating had better corrosion resistance when magnesium alloy was treated with a solution containing 0.5% to 1% phytic acid at temperature 25 to 60 degrees C and pH value at the range of 3-5 for 30 to 60 min. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：1536 / 1541
页数：6
相关论文
共 11 条
  • [1] *CHIN MECH ENG I, 1993, FOUNDR HDB, V3
  • [2] HAGANS PL, 1994, SURFACE ENG, V5, P10
  • [3] Characteristics of PVD-coatings on AZ31hp magnesium alloys
    Hollstein, F
    Wiedemann, R
    Scholz, J
    [J]. SURFACE & COATINGS TECHNOLOGY, 2003, 162 (2-3) : 261 - 268
  • [4] [李瑛 Li Ying], 2004, [中国腐蚀与防护学报, Journal of Chinese Society of Corrosion and Protection], V24, P276
  • [5] Improving corrosion resistance of AZ91D magnesium alloy by nitrogen ion implantation
    Nakatsugawa, I
    Martin, R
    Knystautas, EJ
    [J]. CORROSION, 1996, 52 (12) : 921 - 926
  • [6] SONG GL, 2001, J DAVID ST MAGNESIUM, P255
  • [7] Corrosion resistance improvement of magnesium alloy using nitrogen plasma ion implantation
    Tian, XB
    Wei, CB
    Yang, SQ
    Fu, RKY
    Chu, PK
    [J]. SURFACE & COATINGS TECHNOLOGY, 2005, 198 (1-3) : 454 - 458
  • [8] Chrome-free surface treatments for magnesium alloy
    Umehara, H
    Takaya, M
    Terauchi, S
    [J]. SURFACE & COATINGS TECHNOLOGY, 2003, 169 : 666 - 669
  • [9] YAG laser cladding of an Al-Si alloy onto an Mg/SiC composite for the improvement of corrosion resistance
    Wang, AH
    Yue, TM
    [J]. COMPOSITES SCIENCE AND TECHNOLOGY, 2001, 61 (11) : 1549 - 1554
  • [10] YAO MY, 2001, CHIN J MAT PROTECT, V34, P19
12