scholarly journals Fabrication and evaluation of Rb2Co(H2P2O7)2·2H2O/waterborne polyurethane nanocomposite coating for corrosion protection aspects

RSC Advances ◽  
2017 ◽  
Vol 7 (87) ◽  
pp. 55074-55080 ◽  
Author(s):  
M. A. Deyab ◽  
R. Essehli ◽  
B. El Bali ◽  
M. Lachkar
Keyword(s):  
Carbon Steel ◽  
Corrosion Protection ◽  
Waterborne Polyurethane ◽  
Nanocomposite Coating ◽  
Nacl Solution ◽  
Protection Efficiency

Here we investigate the influence of new acidic pyrophosphate (Rb2Co(H2P2O7)2·2H2O) (DP) incorporation in waterborne polyurethane (WBPU) coatings on the corrosion protection efficiency of WBPU coatings for carbon steel in 3.5% NaCl solution.

Surface modification of graphene-coated carbon steel using aromatic molecules for enhancing corrosion resistance; comparison between type of aryl substitution with different spatial situations

2018 ◽  
Vol 65 (3) ◽  
pp. 249-262 ◽  
Author(s):  
Zahra Shams Ghahfarokhi ◽  
Mojtaba Bagherzadeh ◽  
Ebrahim Ghiamati Yazdi ◽  
Abbas Teimouri
Keyword(s):  
Surface Modification ◽  
Carbon Steel ◽  
Corrosion Protection ◽  
Protection Efficiency ◽  
Graphene Surface ◽  
Content Type ◽  
X Ray ◽  
Aromatic Molecules ◽  
Proposed Modification ◽  
Coated Carbon

Purpose The purpose of this paper is study of the type of functional group and its situation on phenyl molecule, in increasing the corrosion protection of modified graphene layers by it. Corrosion protection efficiency of graphene was raised via modifying the surface of graphene-coated carbon steel (CS/G) by using aromatic molecules. Phenyl groups with three different substitutions including COOH, NO2 and CH3 grafted to graphene via diazonium salt formation route, by using carboxy phenyl, nitro phenyl and methyl phenyl diazonium salts in ortho, meta and para spatial situations. Design/methodology/approach Molecular bindings were characterized by using X-ray diffractometer, fourier-transform infrared spectroscopy (FTIR), Raman and scanning electron microscopy (SEM)/ energy dispersive X-ray analysis (EDXA) methods. Anti-corrosion performance of modified CS/G electrodes was evaluated by weight loss and electrochemical techniques, potentiodynamic polarization (Tafel) and electrochemical impedance spectroscopy, in 3.5 per cent NaCl solution. Findings The obtained results confirmed covalently bonding of phenyl groups to the graphene surface. Also, the observed results showed that substitution spatial situations on phenyl groups can affect charge transfer resistance (Rct), corrosion potential (Ecorr), corrosion current density (jcorr) and the slope of the anodic and cathodic reaction (ßa,c), demonstrating that the proposed modification method can hinder the corrosion reactions. The proposed modification led to restoring the graphene surface defects and consequently increasing its corrosion protection efficiency. Originality/value The obtained results from electrochemical methods proved that protection efficiency was observed in order COOH < NO2 < CH3 and MPD in the para spatial situation and showed the maximum protection efficiency of 98.6 per cent in comparison to other substitutions. Finally, the ability of proposed graphene surface modification route was further proofed by using surface methods, i.e. SEM and EDXA, and contact angles measurements.

scholarly journals Effect of zero charge corrosion protection (ZCCP) on the carbon steel surface in 3.5% NaCl solution

2019 ◽  
Vol 701 ◽  
pp. 012038
Author(s):  
Shaiful Rizam Shamsudin ◽  
Zin Wen Sim ◽  
Rajaselan Wardan ◽  
Nadia Nadhira Mohd Jamalullalel ◽  
Azmi Rahmat
Keyword(s):  
Carbon Steel ◽  
Corrosion Protection ◽  
Steel Surface ◽  
Nacl Solution ◽  
Zero Charge ◽  
Carbon Steel Surface

Corrosion Protection Efficiency of Bilayer Porphyrin-Polyaniline Film Deposited on Carbon Steel

2015 ◽  
Vol 352 (1) ◽  
pp. 16-24 ◽  
Author(s):  
Iuliana Popa ◽  
Eugenia Fagadar-Cosma ◽  
Bogdan-Ovidiu Taranu ◽  
Mihaela Birdeanu ◽  
Gheorghe Fagadar-Cosma ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Corrosion Protection ◽  
Protection Efficiency ◽  
Polyaniline Film

scholarly journals Corrosion Protection Study of Carbon Steel and 316 Stainless Steel Alloys Coated by Nanoparticles

2014 ◽  
Vol 11 (1) ◽  
pp. 116-122
Author(s):  
Baghdad Science Journal
Keyword(s):  
Stainless Steel ◽  
Zinc Oxide ◽  
Carbon Steel ◽  
Atomic Force Microscope ◽  
Corrosion Protection ◽  
Saline Water ◽  
Steel Alloys ◽  
Protection Efficiency ◽  
316 Stainless Steel ◽  
Atomic Force

The Corrosion protection effectiveness of Alimina(Al2O3,50nm)and Zinc oxide (ZnO,30nm) nanoparticales were studied on carbon steel and 316 stainless steel alloys in saline water (3.5%NaCl)at four temperatures: (20,30,40,50 OC)using three electrodes potentiostat. An average corrosion protection efficiencies of 65 %and 80% was achieved using Al2O3 NP's on carbon steel and stainless steel samples respectively, and it seems that no effect of rising temperature on the performances of the coated layers. While ZnO NP'S showed protection efficiency around 65% for the two alloys and little effected by temperature rising on the performanes of the coated layers. The morphology of the coated spesiemses was examined by Atomic force microscope.

Corrosion protection of some Cu-based alloys by polyacrylate-alumina nanocomposite coatings

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Adel Attia ◽  
Lobna Khorshed ◽  
Samir Morsi ◽  
Elsayed Ashour
Keyword(s):  
Corrosion Protection ◽  
Design Methodology ◽  
Open Circuit Potential ◽  
Electrochemical Impedance ◽  
Nanocomposite Coating ◽  
Open Circuit ◽  
Protection Efficiency ◽  
Content Type ◽  
Polyacrylic Polymer

Purpose The purpose of this study was to investigate the polyacrylic polymer/Al2O3 as a new nanocomposite coating to protect brass and Al-bronze in 3.5% NaCl and the role of alumina formulation on their protection efficiency Design/methodology/approach The corrosion efficiency of the nanocomposite coating (NCC) was evaluated by open circuit potential and electrochemical impedance spectroscopy (EIS). Findings The protection efficiency was more in the case of Al-bronze even for the same formulation of alumina NCC indicated the Cu substrate contribution. The Cu oxides in alloys and Al2O3 from the NCC and Al-bronze were responsible for this protection. Originality/value All the techniques supported each other, the presence of alumina was responsible for the corrosion protection efficiency.

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