International Journal of Electrochemical Science
·
2023
·
IF 1.5
Fengshuang Han,Zhili Gong,Rui Wang,Sufang Dang
In this manuscript, the ability of (5-Benzoyl-1H-benzimidazol-2-yl) carbamicacidmethylester (mebendazole, MBD) as an inhibitor of corrosion on 5Cr pipeline steel in HCl medium was explored. Corresponding electrochemical tests, immersion tests and other experiments were designed, and at the same time, the ability of mebendazole to inhibit corrosion of 5Cr steel in HCl medium was screened and proved by means of molecular weight simulation calculation analysis process, and its possible anticorrosion mechanism was also revealed. Electrochemical test results show that mebendazole can successfully prevent 5Cr steel from dissolving in HCl medium, and the inhibition efficiency is particularly significant with the increase of mebendazole content. According to the electrochemical impedance test, the highest corrosion inhibition efficiency ( η ) can reach 94.4 %. The results of immersion weight loss experiment are highly consistent with the electrochemical test data and SEM electron microscope morphology. From the theoretical calculation results, it can be found that under neutral conditions and protonated mebendazole molecules have lower energy gaps and higher dipole moments in solvated and unsolvated environments, and can Parallel adsorption on the metal surface, which also corresponds to its efficient corrosion inhibition performance. In addition, through comparison, it is found that the protonated mebendazole molecule under solvation conditions has the highest binding energy, that is, it is the easiest to interact with 5Cr steel and presents the best anti-corrosion performance.
研究领域:
材料科学
·
电化学
·
防腐蚀工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2016
·
IF 2.76
Hao Li,Sirong Yu,Xiangxiang Han,Yan Zhao
Superhydrophobic surface has attracted great attention because of its potential applications. In this work, a facile method for fabrication of a superhydrophobic coating on pipeline steel surface is reported. A hierarchical structured coating with nanoflakes was fabricated via electrodeposition and solution-immersion, and then the coating achieved superhydrophobic with water contact angle about 157° and sliding angle around 3° after fluorination modification. The surface morphology and wettability changed with different experimental parameters were also investigated. The prepared superhydrophobic coating exhibited efficient self-cleaning and anticorrosion properties. Furthermore, the anti-scaling property of this superhydrophobic coating was confirmed since the CaCO 3 crystals on the superhydrophobic coating were mainly needlelike compared to the rhombohedral CaCO 3 crystals on the surface of steel substrate. This superhydrophobic coating maintained good long-term stability in air, and mechanical and thermal stability under certain environment. This superhydrophobic coating provided potential multifunctional applications, such as self-cleaning, corrosion resistance and anti-scaling properties, of deposition metal or alloy coating.
研究领域:
材料科学
·
表面工程
·
腐蚀科学
·
功能涂层
·
金属防护
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Kejun Shi,Shu Xiao,Qingdong Ruan,Hao Wu,Guohua Chen,Chilou Zhou,Saihua Jiang,Ke Xi,Mohan He,Paul K. Chu
A method for in situ deposition of multi-layered graphene (MLG) coatings is demonstrated to mitigate hydrogen embrittlement of the X70 pipe steel. Carbon is implanted into the nickel catalytic layer pre-deposited by electroplating on the surface of the pipe steel, followed by annealing to segregate and form MLG. The MLG coatings are investigated systematically with respect to the surface morphology, phase structure, hydrogen resistance, corrosion resistance, and molecular dynamics simulation. In the stacked MLG structure, the in situ grown graphene layers interpenetrate each other to boost the coating adhesion and hydrogen resistance. Diffusion and the solid solution formed between the Ni coating and substrate improve the adhesion strength after annealing. The diffusion coefficient and permeability are reduced by 123 times and 48 times, respectively. Slow strain rate tests demonstrate outstanding resistance against hydrogen embrittlement because the MLG coatings inhibit hydrogen evolution, extend the diffusion path, decrease the permeation area, and enhance hydrogen adsorption. Moreover, electrochemical tests indicate that the MLG coatings have better corrosion resistance. These results reveal a viable strategy to use graphene to protect commercial steels from hydrogen embrittlement.
研究领域:
材料科学
·
工程学
✓ 已验证
DOI
高影响因子
Journal of Bionic Engineering
·
2022
·Vol. 19
·期 6
·1601-1614
·
IF 2.995
Li Hao,Peng Yujie,Zhang Kai,Li Pengchang,Xin Lei,Yin Xiaoli,Yu Sirong
Superhydrophobic surfaces (SHS) and slippery lubricant-infused porous surfaces (SLIPS) attract great attention due to their multiple properties in both industries and our daily lives. Here, we first fabricated the SHS with micro-scale flower-like structures composed of nano-sheets on pipeline steel substrate. Then, we obtained the SLIPS by spin-coating lubricant into gaps of micro-scale flower-like structures, with the air still trapped among gaps of nano-sheets. The SLIPS shows excellent liquid repellency as the SHS. The SLIPS also shows stability after the scour of flowing water. These results of polarization curves (Tafel) and electrochemical impedance spectroscopies deduced the SLIPS with better and more stable anti-corrosion property than the SHS. Compared with the SHS, the lack of attachment and CaCO 3 on the SLIPS indicates that the SLIPS demonstrates better anti-fouling and anti-scaling properties than the SHS. Moreover, the SLIPS shows promising wear resistance under the abrasion simulated by sandpaper compared with the SHS. Notably, the air trapped among nano-sheets is conducive to the lubricant flowing to the surface quickly, exhibiting spontaneous self-healing in atmosphere, even if part flower-like structures of the SLIPS subject to damage with the lubricant consumed after scratched.
研究领域:
材料科学
·
腐蚀与防护
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）