赵雪妮,尹琴月,赵振洋,刘家豪,王朋义,王贤贤.压力辅助固态成形法制备钢板表面铝涂层[J].表面技术,2023,52(6):296-306.
ZHAO Xue-ni,YIN Qin-yue,ZHAO Zhen-yang,LIU Jia-hao,WANG Peng-yi,WANG Xian-xian.Preparation of Aluminum Coating on Steel Plate by Pressure-assisted Solid State Forming[J].Surface Technology,2023,52(6):296-306 |
| 压力辅助固态成形法制备钢板表面铝涂层 |
| Preparation of Aluminum Coating on Steel Plate by Pressure-assisted Solid State Forming |
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| DOI：10.16490/j.cnki.issn.1001-3660.2023.06.026 |
| 中文关键词: 铝涂层 成形加工性能 压力辅助固态成形 冶金结合 静态腐蚀速率 耐腐蚀性能 |
| 英文关键词:aluminum coating formability pressure-assisted solid state forming metallurgical bonding static corrosion rate corrosion resistance |
| 基金项目:陕西省重点研发计划(2018GY–168);陕西高校青年创新团队建设项目(2019);陕西省教育厅青年创新团队建设科研计划(21JP018) |
| 作者 | 单位 |
| 赵雪妮 | 陕西科技大学 机电工程学院，西安 710021 |
| 尹琴月 | 陕西科技大学 机电工程学院，西安 710021 |
| 赵振洋 | 陕西科技大学 机电工程学院，西安 710021 |
| 刘家豪 | 陕西科技大学 机电工程学院，西安 710021 |
| 王朋义 | 陕西科技大学 机电工程学院，西安 710021 |
| 王贤贤 | 陕西科技大学 机电工程学院，西安 710021 |
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| Author | Institution |
| ZHAO Xue-ni | College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China |
| YIN Qin-yue | College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China |
| ZHAO Zhen-yang | College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China |
| LIU Jia-hao | College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China |
| WANG Peng-yi | College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China |
| WANG Xian-xian | College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China |
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| 中文摘要: |
| 目的 获得厚度可控的Fe–Al合金层，提高Q235钢板的耐腐蚀性能和成形加工性能。方法 通过创新涂层制备方法，以Q235为基体金属，以铝箔为镀层金属，采用压力辅助固态成形法在Q235钢板表面制备耐腐蚀铝涂层(AlP/Q235)。通过三点弯曲实验研究AlP/Q235的成形性能，通过全浸泡腐蚀失重实验、电化学实验分析研究AlP/Q235的腐蚀性能，利用扫描电子显微镜及其附带的能谱仪对铝涂层弯曲变形后的显微结构、微观组织和元素组成进行表征。探讨压力辅助固态成形铝涂层对基体的保护行为，并阐明铝涂层的腐蚀防护机理。结果 在采用压力辅助固态成形法制备的铝涂层钢板中，铝箔与Q235基体实现了冶金结合，生成了厚度大约为44 mm的Fe–Al合金层，合金层主要由“颗粒状”的FeAl3和“锯齿状”的Fe2Al5相层组成。通过三点弯曲试验测得AlP/Q235的弯曲强度为255 MPa，与Q235相比，提高了11.8%。在NaCl(质量分数为3.5%)溶液中全浸泡腐蚀25 d后，AlP/Q235的平均静态腐蚀速率为0.21 mg/(dm.d)，约为Q235的1/10。在NaCl(质量分数为3.5%)溶液中浸泡，并进行电化学实验，测得AlP/Q235的电流密度Jcorr为1.583 μA/cm2，约为Q235的1/27。结论 采用压力辅助固态成形法制备的AlP/Q235，获得了厚度可控的Fe–Al合金层，有效提高了其耐腐蚀性能和成形加工性能。 |
| 英文摘要: |
| The work aims to prepare aluminum coating on Q235 steel plate by pressure-assisted solid state forming, which is an innovative coating preparation method, and can improve its corrosion resistance and formability without damaging the properties of the matrix material. The corrosion resistance and formability of aluminum coated Q235 (AlP/Q235) steel plate are studied. A Q235 steel plate and an aluminum foil were sanded and polished and then cleaned and dried. An aluminum foil with a thickness of 100 m and a Q235 steel with a thickness of 1 mm were stacked and pressed in a mold for 1 h. The pre-pressed aluminum foil and Q235 steel were sintered in a hot pressing sintering furnace under a vacuum of 10 MPa, a temperature of 630 ℃ and a pressure of 30 MPa. The surface morphology, cross-section morphology and element composition of the samples were observed and analyzed by super depth of field three-dimensional microscope, electron scanning microscope (SEM) and energy dispersive spectrometer (EDS). The phase structure of the coating was characterized by X-Ray diffraction (XRD). The formability and corrosion resistance of the aluminum coated Q235 steel plate were tested by three-point bending test, full immersion test and electrochemical test, and the corrosion protection mechanism of AlP/Q235 was clarified. The thickness of Fe-Al alloy layer was uniform and about 44 μm. The Fe-Al alloy layer was composed of "granular" FeAl3 phase layer and "serrated" Fe2Al5 phase layer. In the Al-Fe alloy layer, the Fe2Al5 phase accounted for the main component, and the FeAl3 phase accounted for only a small part of the intermetallic compound. The bending strength of AlP/Q235 was 255 MPa, which was 11.8% higher than that of Q235. The results of full immersion test showed that the static corrosion rate of AlP/Q235 was 0.21 mg/(dm.d), which was about 1/10 of Q235. The open circuit potential test results showed that the Eocp value of Q235 decreased from −0.5 V to −0.7 V. The Eocp of AlP/Q235 was stable at −0.725 V. An oxide film was formed on the surface of aluminum coating. The polarization test results showed that the self-corrosion current densities of Q235 and AlP/Q235 were 43.404 μA/cm2 and 1.583 μA/cm2 respectively. The polarization resistance was 642.3 Ω/cm2 and 5214.6 Ω/cm2 respectively. According to the fitted polarization curve, the self-corrosion potentials of Q235 and AlP/Q235 were −0.73 V and −0.64 V respectively. The corrosion resistance of AlP/Q235 was improved compared with that of Q235 steel. The corrosion process of AlP/Q235 included charge transfer and diffusion process. Based on the results of the above research, the corrosion protection mechanism of AlP/Q235 was elucidated. Aluminum coating mainly provided protection for low carbon steel through surface Al2O3 oxide layer, self-sealing of corrosion products, barrier of alloy layer and electrochemical protection of aluminum atoms. The metallurgical bonding and Fe-Al alloy layer with controllable thickness are obtained in the AlP/Q235 prepared by pressure-assisted solid state forming. The AlP/Q235 improves the formability and corrosion resistance and can be used in the structural parts of buildings, bridges, ships and automobiles in corrosive environments. |
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