scholarly journals 4-Phenylpyrimidine monolayer protection of a copper surface from salt corrosion

RSC Advances ◽  
2018 ◽  
Vol 8 (14) ◽  
pp. 7340-7349 ◽  
Author(s):  
N. Wei ◽  
Y. Jiang ◽  
Z. Liu ◽  
Y. Ying ◽  
X. Guo ◽  
...  
Keyword(s):  
Copper Surface ◽  
Nacl Solution ◽  
Salt Corrosion ◽  
Self Assembled

The efficiency of a 4-phenylpyrimidine monolayer optimally self-assembled on a copper surface against corrosion by a 3 wt% NaCl solution could reach 83.2%.

scholarly journals Inhibition Effect of Three-Dimensional (3D) Nanostructures on the Corrosion Resistance of 1-Dodecanethiol Self-Assembled Monolayer on Copper in NaCl Solution

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1225 ◽  
Author(s):  
Shuai Hu ◽  
Zhenyu Chen ◽  
Xingpeng Guo
Keyword(s):  
Corrosion Resistance ◽  
Three Dimensional ◽  
Copper Surface ◽  
Nacl Solution ◽  
Self Assembled Monolayer ◽  
Simple Method ◽  
Self Assembled ◽  
Bare Copper ◽  
3D Nanostructure ◽  
Anticorrosion Properties

A novel and simple method to improve the corrosion resistance of copper by constructing a three-dimensional (3D) 1-dodecanethiol self-assembled monolayer (SAM) in 3.5% NaCl solution is reported in this study. Several drops of 1% H3PO4 solution are thinly and uniformly distributed on copper surface to form a 3D nanostructure constituted by Cu3(PO4)2 nanoflowers. The anticorrosion properties of 1-dodecanethiol SAM on copper surface and on copper surface that is treated with H3PO4 solution were evaluated. Results demonstrated that 1-dodecanethiol SAM on bare copper surface exhibits good protection capacity, whereas a copper surface that is pretreated with H3PO4 solution can substantially enhance the corrosion resistance of 1-dodecanethiol SAM.

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

2019 ◽  
Vol 66 (2) ◽  
pp. 168-173
Author(s):  
Lin Liu ◽  
Hongyu Su ◽  
Xue Li ◽  
Yanan Wang ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
Schiff Base ◽  
Corrosion Inhibition ◽  
Electrochemical Measurement ◽  
Copper Surface ◽  
Metal Corrosion ◽  
Dynamics Simulation ◽  
Nacl Solution ◽  
Content Type ◽  
Quantitative Calculation ◽  
Self Assembled

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.

scholarly journals Inhibition Effect of 3D Nanostructures on the Corrosion Resistance of 1-Dodecanethiol Self-Assembled Monolayers on Copper in Nacl Solution

2018 ◽  
Author(s):  
Shuai Hu ◽  
Zhenyu Chen ◽  
Xingpeng Guo
Keyword(s):  
Corrosion Resistance ◽  
Copper Surface ◽  
Self Assembled Monolayers ◽  
Nacl Solution ◽  
Simple Method ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Bare Copper ◽  
3D Nanostructure ◽  
Anticorrosion Properties

A novel and simple method to improve the corrosion resistance of copper by constructing a 3D 1-dodecanethiol self-assembled monolayers (SAMs) in 3.5% NaCl solution is reported in this study. Several drops of 1% H3PO4 solution are thinly and uniformly distributed on copper surface to form a 3D nanostructure constituted by Cu3(PO4)2 nanoflowers. The anticorrosion properties of 1-dodecanethiol SAMs on copper surface and on copper surface treated with H3PO4 solution were evaluated. Results demonstrated that 1-dodecanethiol SAMs on bare copper surface exhibit good protection capacity, whereas a copper surface pretreated with H3PO4 solution can substantially enhance the corrosion resistance of 1-dodecanethiol SAMs.

Contact Angle Variation on a Copper Surface Treated With Self-Assembled Monolayer (SAM) of N-octadecyl Mercaptan

2011 ◽  
Vol 133 (8) ◽  
Author(s):  
Yulong Ji ◽  
Hsiu-hung Chen ◽  
Qingsong Yu ◽  
Xuehu Ma ◽  
H. B. Ma
Keyword(s):  
Contact Angle ◽  
Copper Surface ◽  
Self Assembled Monolayer ◽  
Angle Variation ◽  
Self Assembled

scholarly journals Poly (Vinyl Butyral-Co-Vinyl Alcohol-Co-Vinyl Acetate) Coating Performance on Copper Corrosion in Saline Environment

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 439
Author(s):  
Adriana Samide ◽  
Claudia Merisanu ◽  
Bogdan Tutunaru ◽  
Gabriela Eugenia Iacobescu
Keyword(s):  
Vinyl Acetate ◽  
Vinyl Alcohol ◽  
Electrochemical Impedance ◽  
Copper Surface ◽  
Copper Sample ◽  
Electrochemical Measurements ◽  
Copper Corrosion ◽  
Nacl Solution ◽  
Force Microscopy ◽  
Vinyl Butyral

Poly (vinyl butyral-co-vinyl alcohol-co-vinyl acetate) named further PVBA was investigated as a protective coating for copper corrosion in 0.9% NaCl solution using electrochemical measurements such as, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization associated with atomic force microscopy (AFM). The PVBA coating on the copper surface (Cu-PVBA) was modeled in methanol containing PVBA. Its inhibitory properties against corrosion was comparatively discussed with those of the copper sample treated in methanol without polymer (Cu-Me) and of untreated sample (standard copper). A protective performance of PVBA coating of 80% was computed from electrochemical measurements, for copper corrosion in NaCl solution. Moreover, AFM images designed a specific surface morphology of coated surface with PVBA, clearly highlighting a polymer film adsorbed on the copper surface, which presents certain deterioration after corrosion, but the metal surface was not significantly affected compared to those of untreated samples or treated in methanol, in the absence of PVBA.

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

2014 ◽  
Vol 61 (5) ◽  
pp. 307-313 ◽  
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.

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

RSC Advances ◽  
2016 ◽  
Vol 6 (18) ◽  
pp. 15210-15219 ◽  
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.

Ice-Formation Expansion of Salt Solution and its Effect on Frost Damage of Concrete

2014 ◽  
Vol 633 ◽  
pp. 281-285
Author(s):  
Zu Quan Jin ◽  
Tie Jun Zhao ◽  
Song Gao ◽  
Su Yuan Zhang
Keyword(s):  
Frost Damage ◽  
Corrosion Products ◽  
Ice Formation ◽  
Chloride Salt ◽  
Nacl Solution ◽  
Damage Degree ◽  
Salt Corrosion ◽  
Deterioration Mechanism ◽  
Composite Solution ◽  
Air Entrained Concrete

In order to explain the deterioration mechanism of air entrained concrete subjected to freeze-thaw cycles in water, NaCl, Na2SO4 and composite solution, The damage of concrete and ice-formation expansion of salt corrosion solution are tested. The experimental results show that the damage degree of concrete under salt frost is NaCl solution>composite solution>water>Na2SO4 solution. Considering the chloride penetrated into concrete and following 2nd Fick’s Law, the ice-formation expansion resulted by NaCl solution in surface layer of concrete is higher than that in inner, and the expansion stress at outer layer is 1.73 times of that at inner layer according to the proposed function. The expansion stress difference between the internal and external layer causes spalling damage of concrete in chloride salt frost. The ice-formation expansion of Na2SO4 solution increases with its raising concentration and it is higher than that of NaCl solution at the same temperature. However, the corrosion products are ettringite and gypsum after sulfate salt frost, and the volume of solid corrosion products is barely change, or even reducible.

Sign in / Sign up

Export Citation Format

Share Document