ZHAO Bin, WANG Bin-bin, WANG Kui. The Corrosion Behavior and Microstructure of Q345 Steel with Composite Coating[J]. Development and Application of Materials, 2015, 30(6): 55-59. DOI: 10.19515/j.cnki.1003-1545.2015.06.011
Citation: ZHAO Bin, WANG Bin-bin, WANG Kui. The Corrosion Behavior and Microstructure of Q345 Steel with Composite Coating[J]. Development and Application of Materials, 2015, 30(6): 55-59. DOI: 10.19515/j.cnki.1003-1545.2015.06.011

The Corrosion Behavior and Microstructure of Q345 Steel with Composite Coating

More Information
  • Received Date: May 18, 2015
  • Available Online: March 20, 2024
  • The composite coating on Q345 steel surface was prepared by spraying. The corrosion resistance of the composite coating was tested by salt spray test,the corrosion morphologies was observed by using the SEM,the corrosion rate was calculated,the penetration principle of corrosive media was analyzed by using the electron probe microanalysis( EPMA). The results show that the corrosion rate of Q345 steel with composite coating reduces to approximately 6% and the corrosion resistance has improved. But the corrosion near the scratch was serious. The microstructure of the corrosion product is flocculent loose,but coating can stick firmly to the matrix after the corrosion. Corrosion occurs when Cl-penetrates the primer coating to the matrix. The intermediate coating and top of the coating could prohibit the permeation corrosive fluid,retarding the corrosion.
  • Related Articles

    [1]YU Bo, ZHANG Yi, WU Hao. Study on Microstructure and Properties of A New Type of Sulfuric Acid and Hydrochloric Acid Corrosion-Resistant Cold Rolled Steel[J]. Development and Application of Materials, 2024, 39(2): 57-62.
    [2]WANG Ying, YANG Shengli, LIU Xiaoyong. Study on Tensile Stress Corrosion Behavior of Titanium Alloy at Slow Strain Rate[J]. Development and Application of Materials, 2022, 37(4): 15-20.
    [3]ZHANG Yeqin, ZHONG Ping, DING Xiaoming, LI Huanfeng. Research on Corrosion Resistance of a New Ultra-high Strength Steel[J]. Development and Application of Materials, 2020, 35(3): 16-19.
    [4]ZHOU Dan, LI Jian, TONG Shi, YANG Yang. Research and Industrial Trial Production of Corrosion-resistant E36 Steel for Cargo Tanks[J]. Development and Application of Materials, 2019, 34(4): 43-49. DOI: 10.19515/j.cnki.1003-1545.2019.04.009
    [5]GAO Shuo. Study on Surface Coating and Properties of Q345 Steel for Building Structure[J]. Development and Application of Materials, 2018, 33(5): 60-65. DOI: 10.19515/j.cnki.1003-1545.20180529.001
    [6]WU Chunxue, ZHANG Yongfeng, REN Fangjie. Study on Fatigue Crack Growth Rate of High Pressure Vessel Steel[J]. Development and Application of Materials, 2016, 31(1): 27-29. DOI: 10.19515/j.cnki.1003-1545.2016.01.006
    [7]DENG Chun-ming, ZHOU Ke-song, LIU Min, WU Chao-qun. Influence of Cr on Corrosion Resistance of HVAF WC-Co Coats to Neutral Salt Spray[J]. Development and Application of Materials, 2007, 22(3): 33-36. DOI: 10.19515/j.cnki.1003-1545.2007.03.009
    [8]ZHANG Xiang, LI Zi-quan. Effects of RE,Mg and Ti on the Corrosion Resistance of Zn-4.5%Al Alloy[J]. Development and Application of Materials, 2006, 21(1): 17-20. DOI: 10.19515/j.cnki.1003-1545.2006.01.005
    [9]WANG Li-min, LI Zi-quan. Corrosion Resistance of Anodic Films[J]. Development and Application of Materials, 2005, 20(6): 38-40. DOI: 10.19515/j.cnki.1003-1545.2005.06.011
    [10]Yuan Jingsong. Approximate Calculation of Crack Propagation Rate of Metal Corrosion Fatigue[J]. Development and Application of Materials, 2000, 15(2): 26-29. DOI: 10.19515/j.cnki.1003-1545.2000.02.007

Catalog

    Article Metrics

    Article views (32) PDF downloads (1) Cited by()
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return