A mechanistic study of the enhanced cathodic protection performance of graphene-reinforced zinc rich nanocomposite coating for corrosion protection of carbon steel substrate

2017 ◽  
Vol 727 ◽  
pp. 1148-1156 ◽  
Author(s):  
Hadis Hayatdavoudi ◽  
Mansour Rahsepar
Keyword(s):  
Carbon Steel ◽  
Corrosion Protection ◽  
Cathodic Protection ◽  
Steel Substrate ◽  
Nanocomposite Coating ◽  
Mechanistic Study

The study of the electrochemical properties of zinc-rich coating on the base of water sodium silicate

2019 ◽  
Vol 24 (4) ◽  
pp. 51-58
Author(s):  
Le Hong Quan ◽  
Nguyen Van Chi ◽  
Mai Van Minh ◽  
Nong Quoc Quang ◽  
Dong Van Kien
Keyword(s):  
Carbon Steel ◽  
Electrochemical Properties ◽  
Sodium Silicate ◽  
Cathodic Protection ◽  
Electrochemical Impedance ◽  
Steel Substrate ◽  
Electrical Contact ◽  
Electrochemical Impedance Spectra ◽  
Pure Zinc ◽  
Electric Circuits

The study examines the electrochemical properties of a coating based on water sodium silicate and pure zinc dust (ZSC, working title - TTL-VN) using the Electrochemical Impedance Spectra (EIS) with AutoLAB PGSTAT204N. The system consists of three electrodes: Ag/AgCl (SCE) reference electrode in 3 M solution of KCl, auxiliary electrode Pt (8x8 mm) and working electrodes (carbon steel with surface treatment up to Sa 2.5) for determination of corrosion potential (Ecorr) and calculation of equivalent electric circuits used for explanation of impedance measurement results. It was shown that electrochemical method is effective for study of corrosion characteristics of ZSC on steel. We proposed an interpretation of the deterioration over time of the ability of zinc particles in paint to provide cathodic protection for carbon steel. The results show that the value of Ecorr is between -0,9 and -1,1 V / SCE for ten days of diving. This means that there is an electrical contact between the zinc particles, which provides good cathodic protection for the steel substrate and most of the zinc particles were involved in the osmosis process. The good characteristics of the TTL-VN coating during immersion in a 3,5% NaCl solution can also be explained by the preservation of corrosive zinc products in the coating, which allows the creation of random barrier properties.

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.

Application of Unifuse Overlay Tubes in the Convection Section of Waste-to-Energy Boilers

2003 ◽  
Author(s):  
Pedro Amador ◽  
George Lai
Keyword(s):  
Carbon Steel ◽  
Corrosion Protection ◽  
Steel Substrate ◽  
Gas Metal Arc Welding ◽  
Steel Tube ◽  
Waste To Energy ◽  
Stainless Steel Tube ◽  
Weld Overlay ◽  
Alloy 625 ◽  
Gtaw Process

The modern weld overlay applied by automatic gas-metal-arc welding (GMAW) process using Ni-Cr-Mo-Nb alloy 625 has been extremely successful in providing corrosion and erosion/corrosion protection for the waterwalls of waste-to-energy (WTE) boilers for over a decade. Without alloy 625 weld overlay protection, the carbon steel waterwall of a waste-to-energy boiler would be corroded through in a matter of months. The overlaid waterwalls for numerous WTE boilers have shown excellent performance results with services up to 10 years or more. Welding Services Inc. has developed a patented process for manufacturing weld overlay bimetallic tubes involving GMAW/GTAW process. Unifuse® 625 overlay tubing with carbon steel substrate has been successfully used as screen tubes, superheater tubes and generating banks in the convection section. The overlay tubes have successfully replaced such corrosion protection methods as stainless steel tube shields and refractories.

scholarly journals Prediction of Thermal Spray Coatings Performance in Marine Environments by Combination of Laboratory and Field Tests

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 320
Author(s):  
Rosa Grinon-Echaniz ◽  
Shiladitya Paul ◽  
Rob Thornton ◽  
Philippe Refait ◽  
Marc Jeannin ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Aluminum Alloys ◽  
Corrosion Protection ◽  
Thermal Spray ◽  
Steel Substrate ◽  
Steel Structures ◽  
Thermal Spray Coatings ◽  
Marine Environments ◽  
Low Carbon ◽  
Spray Coatings

Cost-effective corrosion mitigation of offshore steel structures can be achieved by thermal spray coatings. These coatings, when comprised of Al, Zn and their alloys, provide a physical barrier against the environment when intact, and cathodic protection to underlying steel when damaged. Due to the complexity of marine environments, laboratory tests should be combined with field work in order to understand the corrosion protection offered by these coatings. The work presented here was carried out with thermal spray coatings of aluminum alloys (AA1050, AA1100, Al-5Mg) and Zn-15Al prepared by Twin Wire Arc Spray onto low carbon steel substrates. The resulting coatings were ~300 μm in thickness, and 5% of surface area defects were artificially machined in order to expose the steel substrate, simulating mechanical damage or erosion of the coating. Electrochemical data collected over a 90 days period showed a good correlation between laboratory and real marine environment results. Aluminum alloys showed better corrosion protection in fully immersed conditions, while zinc alloys performed better in atmospheric and splash zones. Overall, these results aim to improve design of thermal spray coatings to protect carbon steel in marine environments.

Anticorrosion Protection of TiO2 Nanofilm on the Surface of Carbon Steel

2021 ◽  
Vol 21 (10) ◽  
pp. 5253-5259
Author(s):  
Yu Zhang ◽  
Ruijian Song ◽  
Xiang Zhang
Keyword(s):  
Carbon Steel ◽  
Composite Film ◽  
Cathodic Protection ◽  
Steel Substrate ◽  
Base Material ◽  
Photogenerated Electron ◽  
Maintenance Cost ◽  
Photoelectric Conversion Efficiency ◽  
Low Carbon ◽  
Photoelectric Conversion

Carbon steel (CS) is the preferred base material for construction in various industries due to its low cost; however, industrial equipment failure caused by carbon steel corrosion can lead to several environmental risks and safety hazards, thus limiting its application scenarios. Enhancing the corrosion resistance of carbon steel and reducing the maintenance cost of carbon steel substrate have become a hot topic of current research. Therefore, in this study, a zinc oxide/polyaniline-titanium dioxide composite film (ZnO/PAni-TiO2) with long-lasting photogenerated cathodic protection was constructed based on the photoelectric conversion properties of TiO2. This new TiO2 composite film, which can avoid photogenerated electron–hole complexation, significantly enhanced the photoelectric conversion efficiency of TiO2, thereby decreasing the anodic corrosion current density of low carbon steel and enhancing the cathodic protection of carbon steel. Hence, it is expected to provide a new direction for the preparation of corrosion-resistant TiO2-laminated carbon steel nanofilms.

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