YANG Ming,CHEN Guomei,NI Zifeng*,et al.Preparation and Characterization of GO/BTESPT Silane Composite Film on 40Cr Substrate[J].Plating & Finishing,2020,(9):16-23.
40Cr基体表面GO/BTESPT硅烷复合膜的制备和性能表征
- Title:
- Preparation and Characterization of GO/BTESPT Silane Composite Film on 40Cr Substrate
- 文献标志码:
- A
- 摘要:
- 为了防止40Cr金属基体的腐蚀，在其表面制备添加氧化石墨烯（GO）改性的双-[γ-（三乙氧基硅）丙基]-四硫化物（BTESPT）硅烷复合膜。采用扫描电子显微镜、X射线光电子能谱仪和接触角测量仪分析GO/BTESPT硅烷复合膜在40Cr基体表面的成膜性和疏水性，采用硫酸铜滴定试验和Tafel曲线测试研究其耐蚀性能。结果表明：GO/BTESPT硅烷复合膜在40Cr基体表面成膜性较好，接触角增加至87.41°，表面疏水性增加；与未处理的40Cr基体相比，GO/BTESPT硅烷复合膜试样耐硫酸铜腐蚀时间可达8.41 min，腐蚀电流密度下降了近2个数量级，腐蚀电位正移，表现出良好的耐蚀性能，GO/BTESPT硅烷复合膜在3.5 wt%的NaCl溶液中浸泡3 d后，仍具有一定的耐蚀防护性能。
- Abstract:
- In order to prevent the corrosion of 40Cr metal substrate, 40Cr steel surface was used to prepare the double-[γ-(triethylsilicon) propyl]-four sulfide (BTESPT) silane composite film with graphene oxide(GO). Hydrophobicity and film forming property of silane composite film on 40Cr substrate surface was studied by scanning electron microscope, X-ray photoelectron spectrometer and contact angle meter. Corrosion resistance of GO/BTESPT silane composite film was studied by the cupric sulfate titration test and Tafel curve test. The results show that the film-forming property of GO/BTESPT silane composite film on 40Cr metal substrate is good. The contact angle increases to 87.41° and the surface hydrophobicity increases. Compared with the untreated 40Cr metal substrate, GO/BTESPT silane composite film can endure copper sulfate corrosion for 8.41 min. The corrosion current density of the GO/BTESPT silane composite film has decreased by nearly two orders of magnitude and the corrosion potential shifts positively, indicating that the GO/BTESPT silane composite film exhibits excellent corrosion resistance. After immersed in 3.5 wt% NaCl solution for 3 days, the GO/BTESPT silane composite film still has certain corrosion protection performance.
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