Q345钢预热时间对熔结环氧粉末涂层防护性能的影响I：界面结合性能分析

doi:10.11902/1005.4537.2017.046

中国腐蚀与防护学报

2018, Vol. 38

Issue (2): 124-132 DOI: 10.11902/1005.4537.2017.046

研究报告

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Q345钢预热时间对熔结环氧粉末涂层防护性能的影响I：界面结合性能分析

曹海娇^1,², 魏英华¹(

), 赵洪涛¹, 吕晨曦¹, 毛耀宗¹, 李京¹

1 中国科学院金属研究所沈阳 110016
2 中国科学院大学北京 100049

Effect of Preheating Time on Protective Performance of Fusion Bonded Epoxy Powder Coating on Q345 SteelI: Analysis of Interface Bonding

Haijiao CAO^1,², Yinghua WEI¹, Hongtao ZHAO¹, Chenxi LV¹, Yaozong MAO¹, Jing LI¹

1 Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2 University of Chinese Academy of Sciences, Beijing 100049, China

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摘要:

通过拉伸实验和湿附着力评级实验,研究了210 ℃下基体的预热时间对熔结环氧粉末涂层/Q345钢界面结合性能的影响。结果表明,预热时间对涂层体系结合性能影响显著,Q345基体在210 ℃下预热6 h其结合性能达到最佳。采用CLSM、AFM和XPS等表面测试技术分别对基体表面形貌、粗糙度和化学成分进行表征,并探讨基体表面状态与涂层体系结合性能的相关性。结果表明,预热处理使得Q345基体表面生成致密氧化膜,氧化膜成分由外到内依次为Fe₂O₃层和Fe₃O₄层。随着预热时间延长,表层Fe₂O₃厚度基本不变,内层Fe₃O₄逐渐增厚,基体表面粗糙度改变;基体表面粗糙度的改变影响涂层体系结合性能。

关键词 ：熔结环氧粉末涂层, 预热时间, 结合性能, 基体表面状态

Abstract：

The effect of substrate preheating time on the interface bonding of fusion bonded epoxy powder coating/Q345 substrate was investigated by means of tensile test and wet adhesion test. Results showed that the preheating time presents significant effect on the interface bonding of coating/Q345 substrate, and among others, the best bonding performance could be acquired for the substrate being preheated for 6 h at 210 ℃. The surface morphology, roughness and chemical composition of the substrate were characterized by CLSM, AFM, XPS, and the correlation between the surface state of the substrate and the bonding performance of coating/substrate was inquired into. Results revealed that the preheating treatment resulted in the formation of a dense oxide scale on the surface of Q345 substrate, which composed of an outer layer Fe₂O₃ and an inner layer Fe₃O₄. With the prolonging preheating time, the thickness of Fe₂O₃ layer was almost the same and the inner layer Fe₃O₄ became thicker, whilst the surface roughness of the substrate changed gradually. The change of the surface roughness of the substrate affected the bonding performance of the coating/substrate system.

Key words： fusion bonded epoxy powder coating preheating time bonding performance surface state of substrate

收稿日期: 2017-03-27

基金资助:中国科学院A类战略性先导科技专项 (XDA13040500)

作者简介:

作者简介曹海娇,女,1991年生,硕士生

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引用本文:

曹海娇, 魏英华, 赵洪涛, 吕晨曦, 毛耀宗, 李京. Q345钢预热时间对熔结环氧粉末涂层防护性能的影响I：界面结合性能分析[J]. 中国腐蚀与防护学报, 2018, 38(2): 124-132.
Haijiao CAO, Yinghua WEI, Hongtao ZHAO, Chenxi LV, Yaozong MAO, Jing LI. Effect of Preheating Time on Protective Performance of Fusion Bonded Epoxy Powder Coating on Q345 SteelI: Analysis of Interface Bonding. Journal of Chinese Society for Corrosion and protection, 2018, 38(2): 124-132.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2017.046 或 https://www.jcscp.org/CN/Y2018/V38/I2/124

图1 基体经不同时间预热处理的涂层体系的粘结强度

图2 基体经不同时间预热处理的涂层体系的拉伸断口形貌图

图3 预热不同时间的涂层体系在90 ℃蒸馏水中的湿附着力评级结果

图4 90 ℃蒸馏水中浸泡1 d后4种涂层体系剥离情况

图5 90 ℃蒸馏水中浸泡4 d后4种涂层体系剥离情况

图6 4种涂层体系在90 ℃蒸馏水中浸泡5 d后表面的CLSM像

图7 Q345钢基体210 ℃下加热12 h及Ar+溅射10 s后的XPS全谱

图8 预热不同时间的Q345钢基体表面经Ar+溅射不同时间的Fe2p的XPS谱

图9 经不同时间预热处理的Q345钢基体表面的XPS深度刻蚀图

图10 预热处理不同时间的基体表面形貌的宏观照片和CLSM像

图11 210 ℃预热处理的基体表面粗糙度随加热时间的变化

图12 Q345钢在210 ℃下空气中加热时氧化过程示意图

图13 210 ℃下预热不同时间基体表面的AFM像

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[1]	曹海娇, 魏英华, 赵洪涛, 吕晨曦, 毛耀宗, 李京. Q345钢预热时间对熔结环氧粉末涂层防护性能的影响II：涂层体系失效行为分析[J]. 中国腐蚀与防护学报, 2018, 38(3): 255-264.

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