Study on the preparation and corrosion inhibition of Schiff-base self-assembled membranes

Purpose This paper aims to evaluate the inhibitive effect and adsorption behavior of the 2-amino-5-thiol-1,3,4-thiadiazole vanillin (A) on copper in 3 per cent NaCl solution. Design/methodology/approach A thiazole Schiff bases were synthesized, named, 2-amino-5-thiol-1,3,4-thiadiazole vanillin (A), which was fabricated respectively on copper surface by the molecular self-assembled. Evaluation was carried out by electrochemical measurement and surface analysis techniques. Measurement of static friction coefficient scanning electron microscopy and Contact angle analysis were applied, and it is finally confirmed the existence of the adsorbed film. The inhibitive mechanism of A was evaluated by means of quantitative calculation and molecular dynamics simulation. Findings The electrochemical measurement indicated that the self-assembled molecular film can effectively inhibit the corrosion of copper sheet, when the concentration was 15 mmol⋅L−1 and the assembly time was 6 h, the corrosion inhibition effect was the best, reaching as high as 97.5 per cent. Scanning electron microscopy results showed that the Schiff base compound forms a protective film on the surface of the copper, which effectively blocks the transfer of corrosion particles to the metal substrate, thereby inhibiting the occurrence of corrosion. Adsorption behavior of A followed the Langmuir’s adsorption isotherm and attributed to mixed-type adsorption. The results of Quantitative calculation and molecular dynamics simulation showed that A was adsorbed on Cu (111) surface in parallel. Research limitations/implications In this study, the corrosion inhibition properties of Schiff base film were investigated by combining theory with experiment. Theoretical calculation is helpful to guide the synthesis of efficient and environmentally friendly corrosion inhibitors. Practical implications The damage caused by metal corrosion is great. The self-assembled Schiff base membrane synthesized in this paper is simple and compact, and the corrosion inhibition efficiency of copper in 3 per cent NaCl solution is 97.5 per cent. Social implications Inhibition of metal corrosion can better save energy and reduce economic losses. Originality/value The synthesized Schiff base was prepared on the copper surface by the molecular self-assembled. The Schiff base membrane has a good corrosion inhibition effect on copper in 3 per cent NaCl solution, and the corrosion inhibition efficiency is up to 97.5 per cent.

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Corrosion protection of stainless steel by a self-assembled organosilane bilayer

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-06-2013-1273 ◽

2014 ◽

Vol 61 (5) ◽

pp. 307-313 ◽

Cited By ~ 1

Author(s):

Hairen Wang ◽

Minya Li ◽

June Qu ◽

Zhiyong Cao ◽

Geng Chen ◽

...

Keyword(s):

Contact Angle ◽

Stainless Steel ◽

Corrosion Inhibition ◽

Self Assembly ◽

Ethanol Solution ◽

Organic Layer ◽

Stainless Steel Surface ◽

Nacl Solution ◽

Content Type ◽

Self Assembled

Purpose – The purpose of this paper is to construct a self-assembled double layer of organosilane on the surface of stainless steel and to investigate its corrosion inhibitive capability. Design/methodology/approach – A monolayer of 3-glycidoxypropyltrimethoxysilane (GPTMS) was grafted onto an oxidized AISI 430SS (AISI 430 stainless steel) surface substrate from dry toluene solution. The hydrolysis of 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDS) molecules was used to anchor a second organic layer from mixed water-ethanol solution. The adsorption behavior and corrosion inhibition properties of the monolayer and also the bilayer were investigated by potentiodynamic polarization, scanning electron microscope (SEM), Fourier transformed infrared spectroscopy (FTIR) and contact angle measurements. Findings – The GPTMS/PFDS bilayer was successfully deposited onto the oxidized AISI 430SS surface. The optimal assembling time for the filming of the first GPTMS monolayer is 6 hours. Suitable values of pH and temperature of the PFDS self-assembly solution were pivotal to the successful deposition of the second layer. Compared to the GPTMS monolayer, the GPTMS/PFDS bilayer exhibited a significant enhancement of the corrosion inhibition performance of AISI 430SS in NaCl solution. Research limitations/implications – The contact angle value measured on the bilayer-modified surface was somewhat lower than the reported value of a complete fluorinated surface. However, further optimization of the assembling condition is needed to obtain more orderly and denser films. Originality/value – This paper provides useful information regarding the preparation of an organosilane bilayer on the surface of stainless steel and its corrosion inhibition properties in NaCl solution. It illustrates potential application prospects of GPTMS/PFDS bilayers for surface treatment of stainless steel.

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Corrosion inhibition and friction-reduction property of tetrazole derivatives on copper

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-09-2017-1839 ◽

2018 ◽

Vol 65 (4) ◽

pp. 361-367 ◽

Cited By ~ 2

Author(s):

Lin Liu ◽

Hongyu Su ◽

Jinjuan Xing ◽

Dan Peng ◽

Qiang Zhang ◽

...

Keyword(s):

Molecular Dynamics ◽

Molecular Dynamics Simulation ◽

Friction Coefficient ◽

Static Friction ◽

Electrochemical Measurement ◽

Dynamics Simulation ◽

Content Type ◽

Static Friction Coefficient ◽

Quantitative Calculation ◽

Ethanol System

Purpose This paper aims to evaluate the inhibitive effect and adsorption behavior of 5-(ethylthio)-1H-tetrazole (EHT) and 5-(benzylthio)-1H-tetrazole (BHT) on copper in a sulfur-ethanol system. Design Methodology Approach Evaluation was carried out using electrochemical measurement and surface analysis techniques. Measurements of static friction coefficient by scanning electron microscopy and contact angle analysis were applied and finally confirmed the existence of the adsorbed film. The inhibitive mechanism of the two compounds was evaluated by means of quantitative calculation and molecular dynamics simulation. The friction coefficient of corrosion surface before and after adding corrosion inhibitor was determined through static friction coefficient measurements. Findings The electrochemical measurement indicated that the most effective concentration of two corrosion inhibitors was 70 mg L–1, while the inhibition efficiency of that was EHT > BHT. The friction coefficient data showed that the addition of corrosion inhibitor reduced the roughness of the corrosion surface. Adsorption behavior of two inhibitors followed the Langmuir’s adsorption isotherm and was attributed to mixed-type adsorption. The results of quantitative calculation and molecular dynamics simulation showed that tetrazole rings of the two inhibitors and its connected S atoms were adsorbed on Cu(111) surface in parallel. Originality Value The corrosion inhibition performance of two tetrazolium derivatives in a sulfur-ethanol system was studied by combining experiments with theory, which provided a theoretical basis for the future research.

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A novel method to protect bronze in atmospheric environment: the click-assembly of triazole film

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-07-2019-2159 ◽

2020 ◽

Vol 67 (3) ◽

pp. 295-304

Author(s):

Hao Zhou ◽

Kai Zhang ◽

Lin Zhang ◽

Jiamin Lu ◽

Jin Li ◽

...

Keyword(s):

Click Reaction ◽

Copper Alloys ◽

Copper Surface ◽

Dynamics Simulation ◽

Atmospheric Environment ◽

Inhibition Mechanism ◽

Protective Film ◽

Chemical Calculation ◽

Content Type ◽

Environment Simulation

Purpose The authors have prepared the triazole film on copper surface by click reaction and explored its inhibition mechanism. Design/methodology/approach The protective film is assembled by immersing bronze in solution containing p-toluenesulfonyl azide (TA) and propiolic acid (PA). Findings Fourier transform infrared spectroscopy (FT-IR) indicates that triazole (TTP) film was formed on bronze surface via click chemistry reaction between TA and PA. It shows TTP film has a good protection for bronze in the atmospheric environment simulation solution. Quantum chemical calculation (QC) and molecule dynamics simulation suggests TTP molecule adsorbs on bronze surface via N and O. Originality/value This is beneficial to develop the corrosion inhibitors for the corroded copper alloys.

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Corrosion inhibition behavior of four benzimidazole derivatives and benzotriazole on copper surface

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-12-2019-2235 ◽

2020 ◽

Vol 67 (6) ◽

pp. 565-574

Author(s):

Lin Liu ◽

Shuang Lu ◽

Ya Qi Wu ◽

Jin Yin Xie ◽

Jinjuan Xing

Keyword(s):

Electrochemical Measurement ◽

Copper Surface ◽

Molar Ratio ◽

Benzimidazole Derivatives ◽

Content Type ◽

Force Microscopy ◽

Angle Measurements ◽

Atomic Force ◽

Mixture Concentration ◽

Contact Angle Measurements

Purpose This paper aims to reduce environment pollution caused by benzotriazole. The authors chose one of the best inhibitors from 2-aminobenzimidazole, 2-methylbenzimidazol, 2-mercaptobenzimidazole and benzimidazole in combination with benzotriazole. Design/methodology/approach The electrochemical measurement indicated that 2-methylbenzimidazol had the best inhibition behavior. Then, it was mixed with benzotriazole. Techniques such as field emission scanning electron microscopy, atomic force microscopy, Raman spectroscopy and optical contact angle measurements were used. Findings The results showed that the inhibition efficiency was up to 99.98%, when the mixture concentration was 20 mmol/L and the molar ratio 1:1. Originality/value 1-benzotriazole was mixed with 2-methylbenzimidazol for the first time. During the exist of methyl, 2-methylbenzimidazol has the better inhibition; this point was ignored by researchers. Graphical abstract

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Experimental and theoretical studies of 4,6-diamino-2-mercaptopyrimidine as a copper inhibitor in 3.5 wt% NaCl solution

RSC Advances ◽

10.1039/c5ra20246a ◽

2016 ◽

Vol 6 (18) ◽

pp. 15210-15219 ◽

Cited By ~ 7

Author(s):

Zhi Cheng ◽

Shi Mo ◽

Jing Jia ◽

Ji Feng ◽

Hong Qun Luo ◽

...

Keyword(s):

Corrosion Inhibition ◽

Inhibition Efficiency ◽

Copper Surface ◽

Theoretical Studies ◽

Nacl Solution ◽

High Corrosion ◽

Corrosion Inhibition Efficiency ◽

Experimental And Theoretical Studies

4,6-Diamino-2-mercaptopyrimidine can be adsorbed on copper surface and exhibits a high corrosion inhibition efficiency in 3.5 wt% NaCl solution.

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Investigation the Corrosion Inhibition Effect of Itraconazole on Copper in H2SO4 at Different Temperatures: Combining Experimental and Theoretical Studies

Materials ◽

10.3390/ma11112107 ◽

2018 ◽

Vol 11 (11) ◽

pp. 2107 ◽

Cited By ~ 7

Author(s):

Zhili Gong ◽

Shini Peng ◽

Xiaomei Huang ◽

Lanzhou Gao

Keyword(s):

Corrosion Inhibition ◽

Theoretical Calculations ◽

Physical Adsorption ◽

Electrochemical Measurement ◽

Copper Surface ◽

Experimental Results ◽

Adsorption Model ◽

Inhibition Effect ◽

Different Temperatures ◽

Measurement Surface

The anti-corrosion inhibition effect of itraconazole on copper (Cu) in 0.5 M H2SO4 is observed with variety of experimental methods, including electrochemical measurement, surface morphology analysis, and theoretical calculations. These experimental results all confirm that itraconazole exhibits excellent anti-corrosion performance in the certain temperatures range (298 K–313 K) for copper in sulfuric acid solution. In addition, corresponding adsorption isothermal models were used to fit the adsorption behavior of itraconazole on the copper surface. The results show that the Langmuir adsorption model agrees best with the experimental results. The adsorption of itraconazole on the copper surface belongs to chemical and physical adsorption.

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Copper surface protection by organothiol self-assembled monolayers

MRS Proceedings ◽

10.1557/opl.2015.399 ◽

2015 ◽

Vol 1746 ◽

Author(s):

Sira Suren ◽

Supattra Haokratoke ◽

Soorathep Kheawhom

Keyword(s):

Corrosion Inhibition ◽

Coating Layer ◽

Copper Surface ◽

Self Assembled Monolayers ◽

Oxygen Plasma Treatment ◽

Water Contact ◽

Surface Protection ◽

Assembled Monolayers ◽

Forming Temperature ◽

Self Assembled

ABSTRACTThis work investigates the effects of concentration of organothiol molecules and temperature used during self-assembled monolayers (SAMs) formation on quality of the organothiol SAMs coating layer obtained in terms of wettability, corrosion inhibition efficiency and carbon to copper ratio. The organothiol SAMs were coated on copper substrates prepared by electro-polishing followed by oxygen plasma treatment for 15 s. Three types of organothiol SAMs including 1-octanethiol (OTT), 2-ethylhexanethiol (2-EHT) and 2-phenylethanethiol (2-PET) were investigated. Concentration of organothiol molecules ranging from 0.005 to 0.02 M in isopropanol and forming temperature ranging from -15 to 50°C were studied. It was found that all organothiol SAMs of 0.01 M provided the SAMs coating layer with the highest quality. The SAMs formed at 40°C with OTT and 2-EHT, and at 0°C with 2-PET were the most favorable condition with the highest water contact angle of 124.79o, 130.66o and 120.58o at corrosion inhibition efficiencies of 96.24%, 99.37% and 98.90%, respectively.

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Adsorption and corrosion inhibition of phytic acid calcium on the copper surface in 3wt% NaCl solution

Corrosion Science ◽

10.1016/j.corsci.2014.02.001 ◽

2014 ◽

Vol 83 ◽

pp. 147-154 ◽

Cited By ~ 54

Author(s):

Chuan-chuan Li ◽

Xiao-yu Guo ◽

Shu Shen ◽

Ping Song ◽

Ting Xu ◽

...

Keyword(s):

Phytic Acid ◽

Corrosion Inhibition ◽

Copper Surface ◽

Nacl Solution

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The corrosion behavior of chromated AA2024 aluminum alloy in 3.5% NaCl solution

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-01-2019-2070 ◽

2019 ◽

Vol 66 (6) ◽

pp. 879-887 ◽

Cited By ~ 5

Author(s):

Yong Zhou ◽

Pei Zhang ◽

Jinping Xiong ◽

Fuan Yan

Keyword(s):

Aluminum Alloy ◽

Grain Boundary ◽

Corrosion Behavior ◽

Electrochemical Measurement ◽

Nacl Solution ◽

Content Type ◽

Chromate Conversion Coating ◽

Chromate Coating ◽

Corrosion Mechanisms ◽

Corrosion Pits

Purpose A chromate conversion coating was prepared on the surface of bare AA2024 aluminum alloy by direct immersion in the chromating treatment bath, and the corrosion behavior of chromated AA2024 aluminum alloy in 3.5 per cent NaCl solution was studied by electrochemical measurement and microstructural observation. Design/methodology/approach According to the polarization curve test and the scanning electron microscope observation, the corrosion evolution of chromated AA2024 in 3.5 per cent NaCl solution was divided into the following three stages: coating failure, pitting corrosion and intergranular corrosion (IGC). Findings In the first stage, the chromate coating degraded gradually due to the combined action of chloride anions and water molecules, resulting in the complete exposure of AA2024 substrate to 3.5 per cent NaCl solution. Subsequently, in the second stage, chloride anions adsorbed at the sites of θ phase (Al2Cu) and S phase (Al2CuMg) on the AA2024 surface preferentially, and some corrosion pits initiated at the above two sites and propagated towards the deep of crystal grains. However, the propagation of a pit terminated when the pit front arrived at the adjacent grain boundary, where the initiation of IGC occurred. Originality/value Finally, in the third stage, the corrosion proceeded along the continuous grain boundary net and penetrated the internal of AA2024 substrate, resulting in the propagation of IGC. The related corrosion mechanisms for the bare and the chromated AA2024 were also discussed.

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