赵倩玉,惠芯蕊,王亚楠,高珊,张才毅,郭章伟,郭娜,刘涛.模拟海洋大气环境下生物矿化膜抑制低合金钢腐蚀行为研究[J].表面技术,2021,50(6):272-280.
ZHAO Qian-yu,HUI Xin-rui,WANG Ya-nan,GAO Shan,ZHANG Cai-yi,GUO Zhang-wei,GUO Na,LIU Tao.Study on the Inhibited Corrosion of Low Alloy Steel by Biomineralized Film in Simulative Marine Atmosphere[J].Surface Technology,2021,50(6):272-280
模拟海洋大气环境下生物矿化膜抑制低合金钢腐蚀行为研究
Study on the Inhibited Corrosion of Low Alloy Steel by Biomineralized Film in Simulative Marine Atmosphere
投稿时间:2020-07-06  
DOI:10.16490/j.cnki.issn.1001-3660.2021.06.031
中文关键词:  低合金钢  大气腐蚀  生物矿化膜  薄液膜  电化学测试  卡尔文探针测试技术
英文关键词:low alloy steel  atmospheric corrosion  biomineralized film  thin electrolyte layer  electrochemical measurement  Kelvin probe technique
基金项目:国家自然科学基金(41976039,42006039,51901127);上海市自然科学基金(19ZR1422100);上海市军民融合发展专项资金(2019-jmrh1-kj45)
作者单位
赵倩玉 上海海事大学,上海 201306 
惠芯蕊 上海海事大学,上海 201306 
王亚楠 上海海事大学,上海 201306 
高珊 宝山钢铁股份有限公司,上海 201900 
张才毅 宝山钢铁股份有限公司,上海 201900 
郭章伟 上海海事大学,上海 201306 
郭娜 上海海事大学,上海 201306 
刘涛 上海海事大学,上海 201306 
AuthorInstitution
ZHAO Qian-yu Shanghai Maritime University, Shanghai 201306, China 
HUI Xin-rui Shanghai Maritime University, Shanghai 201306, China 
WANG Ya-nan Shanghai Maritime University, Shanghai 201306, China 
GAO Shan Baoshan Iron & Steel Co., Ltd, Shanghai 201900, China 
ZHANG Cai-yi Baoshan Iron & Steel Co., Ltd, Shanghai 201900, China 
GUO Zhang-wei Shanghai Maritime University, Shanghai 201306, China 
GUO Na Shanghai Maritime University, Shanghai 201306, China 
LIU Tao Shanghai Maritime University, Shanghai 201306, China 
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中文摘要:
      目的 通过微生物诱导矿化在低合金钢表面制备生物矿化膜,减缓低合金钢在海洋环境中的大气腐蚀。方法 采用生物矿化的原理,将低合金试样浸入一种海洋假交替单胞菌(Pseudoalteromonas lipolytica)培养液中生成生物矿化膜,通过电化学测试(电化学阻抗、极化曲线)、开尔文探针测试等方法检测薄液膜下生物矿化膜对金属的保护效果,并结合扫描电子显微镜、白光干涉仪、红外光谱等技术对样品的表面形貌和生物矿化膜的组成结构进行分析。通过极化曲线测试,选用腐蚀最严重的50 μm薄液膜进行实验。结果 覆有生物矿化膜的样品在薄液膜下浸泡24 d时,白光干涉图中未发现腐蚀现象,说明此时生物矿化膜可以很好地保护样品。浸泡30 d后,样品表面产生局部腐蚀,说明此时生物矿化膜的保护性能下降。此外,SKP测试中,浸泡前24 d,伏打电位由–0.16 V降至–0.2 V,较为缓慢,但从24 d浸泡到30 d时,伏打电位由–0.2 V降为–0.45 V,腐蚀电位也进一步负移,并且在盐雾试验照片中,可肉眼观察到30 d时金属表面出现了腐蚀产物。通过红外光谱峰值分析发现,24 d后,生物矿化膜中有机物的振动峰峰值降低或消失,矿化膜出现缺陷,金属开始腐蚀。结论 在薄液膜的浸泡下,生物矿化膜可以很好地保护金属在前24 d内不被腐蚀。浸泡30 d后,矿化膜出现缺陷,无法避免腐蚀介质与金属接触,故此时保护作用下降。
英文摘要:
      To inhibit the corrosion of low alloy steel in marine atmospheric environment, the bacteria induced mineralization was used to prepare a bimineralized film on steel surface. In this paper, a novel and “green” approach was applied for protecting steel by a marine bacterium Pseudoalteromonas lipolytica. This approach protects steel from corrosion in the marine atmospheric environment via the formation of an organic-inorganic hybrid film, which is composed of calcite and extracellular polymeric substances. The corrosion resistance of the biomineralized film in a thin electrolyte layer was studied by the Electrochemical Impedance Spectroscopy (EIS), Potentiodynamic Polarization and Kelvin probe technique. The morphology and composition of the biomineralized film were analyzed by SEM, FTIR and 3D optical profilometer. The most corrosive 50 μm thin electrolyte layer was chosen for the test for 30 d. After 24 d, the biomineralized film exhibited a good corrosion inhibition, which was observed by the 3D optical profilometer. Moreover, SKP test showed the voltaic potential kept stable, only decreasing from –0.16 V to –0.2 V. However, the corrosion occurred on steel surface as well as voltaic potential decreased from –0.20 V to –0.45 V after 30 d, indicating that the corrosion protection of biomineralized film decreased. In addition, the salt spray test images showed signs of corrosion after 24 d, resulted from the damage of the biomineralized film. The result was confirmed by the FTIR, in which the vibrational peak value of organics in biomineralized film decreased. Therefore, this study indicates that he biomineralized film can protect the metal from corrosion in the first 24 d under the immersion of thin electrolyte layer. After immersion for 30 d, due to the dissolution of organic matter in the biomineralized film, the mineralized film has defects and cannot avoid the permeation of the corrosive medium. In the future, the lasting and the compact of the biomineralized film should be further improved for real application.
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