scholarly journals Corrosion Protection Mechanism of Polyaniline Blended Organic Coating on Steel

2009 ◽  
Vol 156 (4) ◽  
pp. C127 ◽  
Author(s):  
S. Sathiyanarayanan ◽  
R. Jeyaram ◽  
S. Muthukrishnan ◽  
G. Venkatachari
Keyword(s):  
Corrosion Protection ◽  
Organic Coating ◽  
Protection Mechanism

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 Corrosion protection mechanism of Ce4+/organic inhibitor for AA2024 in 3.5% NaCl

RSC Advances ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 2227-2240 ◽  
Author(s):  
Mohamed Gobara ◽  
Ahmad Baraka ◽  
Robert Akid ◽  
Mahmoud Zorainy
Keyword(s):  
Corrosion Protection ◽  
Protection Mechanism ◽  
Organic Inhibitor

Proposed corrosion protection mechanism of Ce4+/ organic inhibitor for AA2024.

Corrosion Protection Performance of Organic Offshore Coating Systems at −60 °C Temperature Shock

2016 ◽  
Vol 138 (6) ◽  
Author(s):  
A. W. Momber ◽  
M. Irmer ◽  
N. Glück ◽  
P. Plagemann
Keyword(s):  
Corrosion Protection ◽  
Loss Modulus ◽  
Accelerated Aging ◽  
Mechanical Analysis ◽  
Organic Coating ◽  
Temperature Sensitive ◽  
Sensitive Coating ◽  
Protection Capability ◽  
High Storage ◽  
Very High

Six organic coating systems were investigated according to their corrosion protection performance under simulated Arctic offshore conditions. The investigations involved accelerated aging, coating adhesion measurements, and dynamic mechanical analysis (DMA). The test conditions were adapted to Arctic offshore conditions, which mainly covered temperature shocks between −20 and −60 °C, chloride exposure, dry–wet cycles, and ultraviolet (UV) radiation. Corrosion protection capability dropped for all coatings if temperature decreased from −20 °C to −60 °C. Two types of coatings could be classified according to their response to the corrosive load: temperature-sensitive coatings and insensitive coatings. Adhesive effects (interface between coating system and substrate) were found to be marginal only at low temperatures and did not affect the response of the coatings to the corrosive load. Cohesive effects (mechanical properties of free polymer films) could be identified in terms of a very high storage modulus and changes in the loss modulus for a temperature-sensitive coating at −60 °C.

POSS-tetraaniline modified graphene for active corrosion protection of epoxy-based organic coating

2020 ◽  
Vol 383 ◽  
pp. 123160 ◽  
Author(s):  
Yuwei Ye ◽  
Dongping Yang ◽  
Dawei Zhang ◽  
Hao Chen ◽  
Haichao Zhao ◽  
...  
Keyword(s):  
Corrosion Protection ◽  
Organic Coating ◽  
Modified Graphene ◽  
Active Corrosion
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