scholarly journals Evaluating the performance of MoS2 based materials for corrosion protection of mild steel in an aggressive chloride environment

RSC Advances ◽  
2017 ◽  
Vol 7 (28) ◽  
pp. 17332-17335 ◽  
Author(s):  
S. ArunKumar ◽  
V. Jegathish ◽  
R. Soundharya ◽  
M. JesyAlka ◽  
C. Arul ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Mild Steel ◽  
Corrosion Protection ◽  
Appreciable Increase ◽  
Chloride Environment

The incorporation of Fe, Co, and Ni ions resulted in an appreciable increase in the corrosion resistance properties of MoS2.

Corrosion protection of hydrophobic bisphenol A-based polybenzoxazine coatings on mild steel

RSC Advances ◽  
2016 ◽  
Vol 6 (7) ◽  
pp. 5805-5811 ◽  
Author(s):  
Xin Lu ◽  
Yan Liu ◽  
Changlu Zhou ◽  
Wenfei Zhang ◽  
Zhong Xin
Keyword(s):  
Corrosion Resistance ◽  
Bisphenol A ◽  
Mild Steel ◽  
Corrosion Protection ◽  
Dip Coating ◽  
Thermal Curing ◽  
Excellent Corrosion Resistance ◽  
Curing Method

Hydrophobic bisphenol A-based polybenzoxazine coatings with excellent corrosion resistance were prepared through a simple dip coating and thermal curing method.

EIS study of the corrosion behavior of an organic coating applied on Algerian oil tanker

2020 ◽  
Vol 117 (6) ◽  
pp. 610
Author(s):  
Nadia Hammouda ◽  
Kamel Belmokre
Keyword(s):  
Corrosion Protection ◽  
Electrochemical Impedance ◽  
Paint Film ◽  
Organic Coating ◽  
Diffusion Resistance ◽  
Double Layer Capacitance ◽  
Carbon Steel Surface ◽  
Chloride Environment ◽  
Oil Tanker ◽  
Epoxy Paint

Organic coatings are widely employed in the corrosion protection of most metal surfaces, particularly steel. They provide a barrier against corrosive species present in the environment, due to their high resistance to oxygen, water and ions transport. This study focuses on the evaluation of corrosion protection performance of epoxy paint on the carbon steel surface in chloride environment (3% NaCl) by Electrochemical Impedance Spectroscopy (EIS). The electrochemical behavior of painted surface was estimated by EIS parameters that contained paint film resistance, paint film capacitance and double layer capacitance. On the basis of calculation using EIS spectrums it was observed that pore resistance (Rpore) decreased with the appearance of doubled layer capacitance (Cdl) due to the electrolyte penetration through the film. This was further confirmed by the decrease of diffusion resistance (Rd) which was also the indicator of the deterioration of paint film protectiveness. Microscopic analyses have shown that oxidation dominates the corroded surfaces.

scholarly journals Design and Multidimensional Screening of Flash-PEO Coatings for Mg in Comparison to Commercial Chromium(VI) Conversion Coating

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 337
Author(s):  
Ewa Wierzbicka ◽  
Marta Mohedano ◽  
Endzhe Matykina ◽  
Raul Arrabal
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Protection ◽  
Electrochemical Impedance ◽  
Salt Spray ◽  
Conversion Coating ◽  
Neutral Salt ◽  
Chromium Vi ◽  
Alkaline Electrolytes ◽  
Az31b Alloy ◽  
Plasma Electrolytic

REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) regulations demand for an expedient discovery of a Cr(VI)-free alternative corrosion protection for light alloys even though the green alternatives might never be as cheap as current harmful technologies. In the present work, flash- plasma electrolytic oxidation coatings (FPEO) with the process duration < 90 s are developed on AZ31B alloy in varied mixtures of silicate-, phosphate-, aluminate-, and fluoride-based alkaline electrolytes implementing current density and voltage limits. The overall evaluation of the coatings’ anticorrosion performance (electrochemical impedance spectroscopy (EIS), neutral salt spray test (NSST), paintability) shows that from nine optimized FPEO recipes, two (based on phosphate, fluoride, and aluminate or silicate mixtures) are found to be an adequate substitute for commercially used Cr(VI)-based conversion coating (CCC). The FPEO coatings with the best corrosion resistance consume a very low amount of energy (~1 kW h m−2 µm−1). It is also found that the lower the energy consumption of the FPEO process, the better the corrosion resistance of the resultant coating. The superb corrosion protection and a solid environmentally friendly outlook of PEO-based corrosion protection technology may facilitate the economic justification for industrial end-users of the current-consuming process as a replacement of the electroless CCC process.

scholarly journals Influence of Rust Inhibitor on the Corrosion Resistance of Reinforcement in Cement Paste with Chloride

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 606
Author(s):  
Linchun Zhang ◽  
Ailian Zhang ◽  
Ke Li ◽  
Qian Wang ◽  
Junzhe Liu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Cement Paste ◽  
Photoelectron Spectroscopy ◽  
Electrical Resistance ◽  
Corrosion Properties ◽  
Passivation Film ◽  
Steel Bars ◽  
Assembly Unit ◽  
Chloride Environment ◽  
Rust Inhibitor

The electrical resistance and polarization effect of cement paste containing reinforcement were tested to research the anti-corrosion properties of steel bars in cement paste. Moreover, the microstructure and composition of passivation film and rust on the steel bars were studied. The water–cement ratio of the cement paste in this study was 0.3, with 0.5% NaCl, 1% NaNO2, and 1% Benzotriazole, and an assembly unit of 0.5% NaNO2 + 0.5% Benzotriazole by mass of cement was added to the cement to provide a chloride environment. X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM) were applied to research the composition of the passivation film and the microstructure of the cement paste, respectively. The results indicated that the samples with the assembly unit of 0.5% NaNO2 + 0.5% Benzotriazole showed the highest electrical resistance and polarization electrical resistance, while the specimens with 1.0% Benzotriazole showed the lowest electrical resistance and polarization electrical resistance. Moreover, the passivation film of steel bars weakened with increasing distance from the surface of the steel bars. Therefore, the corrosion of steel bars becomes more serious with increasing distance. Finally, the influence of the rust inhibitor on the corrosion resistance of steel bars in the specimens decreased in the following order: 0.5% NaNO2 + 0.5% Benzotriazole >1.0% NaNO2>1.0% Benzotriazole.

Mesoporous CeO2 containers in water-borne epoxy coatings for dual active corrosion protection of mild steel

2021 ◽  
Vol 158 ◽  
pp. 106376
Author(s):  
Songhua Gu ◽  
Hongwei Shi ◽  
Chunjie Zhang ◽  
Wei Wang ◽  
Fuchun Liu ◽  
...  
Keyword(s):  
Mild Steel ◽  
Corrosion Protection ◽  
Epoxy Coatings ◽  
Mesoporous Ceo2 ◽  
Water Borne ◽  
Active Corrosion

Controlled release and corrosion protection by self-assembled colloidal particles electrodeposited onto magnesium alloys

2015 ◽  
Vol 3 (8) ◽  
pp. 1667-1676 ◽  
Author(s):  
Jiadi Sun ◽  
Ye Zhu ◽  
Long Meng ◽  
Wei Wei ◽  
Yang Li ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Controlled Release ◽  
Magnesium Alloys ◽  
Corrosion Protection ◽  
Colloidal Particles ◽  
Self Assembled ◽  
Bioactive Agents

Self-assembled nanoparticles loaded with bioactive agents were electrodeposited to provide the magnesium alloy with controlled release and corrosion resistance properties.

Room temperature electrosynthesis of TinO2n-1 film and its bilayer with PNMPy on mild steel for corrosion protection in sulphuric acid

2021 ◽  
pp. 137996
Author(s):  
Nuran Özçiçek Pekmez ◽  
Merve Uğur ◽  
Erhan Karaca ◽  
Zeliha Ertekin ◽  
Kadir Pekmez
Keyword(s):  
Mild Steel ◽  
Sulphuric Acid ◽  
Corrosion Protection ◽  
Room Temperature
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