Menu
Search
Filters
Close
Menu

Development of Eco-friendly Chromium Electrodeposit for Corrosion Resistance in Chloride-containing Environment

Picture for Development of Eco-friendly Chromium Electrodeposit for Corrosion Resistance in Chloride-containing Environment
Available for download

Overtime, chromium has traditionally been used as a surface coating in numerous industrial application such as automotive and general engineering products because of its excellent wear resistance, low coefficient of friction, high resistance to hear and corrosion. Owing to its advantages, several deposition methods have been developed to coat Cr on different surfaces such as plasma nitriding, vapor deposition, physical coating spray, electrodeposition and others. Among these techniques, electrodeposition stands out because of its simple and versatile approach to producing Cr deposit under ambient temperature and normal pressure, with benefits of low cost, high deposition rate, good homogeneity of coating thickness, and intriguing ability to coat substrates of complicated geometrical forms.

Product Number: 51323-19027-SG
Author: Bright O. Okonkwo, Chaewon Jeong, Taejeong An, Hyun Joon Eom, Changheui Jang
Publication Date: 2023
$0.00
$20.00
$20.00

In this study, electrodeposited chromium (Cr) coatings are deposited on 3O4L stainless steel (SS) from a trivalent Cr bath at temperatures of 30°C and 80°C. For better adhesion of coating layer, a new pretreatment method was developed. The scanning electron microscope (SEM), 3D profilometry and x-ray diffraction (XRD) results show that the coatings produced at bath temperatures of 30°C and 80°C are clearly distinct in thickness, composition, surface morphology and surface topography. The coating formed at 30°C has a higher carbide content, coating thickness and roughness, as well as a high degree of coating defect like cracks and pores, as compared to the crack-free coating electrodeposited at 80°C. From the XRD results, it is observed that amorphization of the Cr coating increases with decrease temperature. Finally, the electrochemical behavior of the coatings and the bare SS in 3.5 wt% NaCl environment were investigated with potentiodynamic polarization test. The results show that the localized (pitting) corrosion resistance of the 304L SS canister material is improved by the Cr coatings electrodeposited at 30°C and 80°C. Subsequently, pit quantification and characterization show that the coating produced at higher bath temperature has a better ability to suppress pitting and possibly chloride induced stress corrosion cracking (CISCC) than that produced at atmospheric temperature.

In this study, electrodeposited chromium (Cr) coatings are deposited on 3O4L stainless steel (SS) from a trivalent Cr bath at temperatures of 30°C and 80°C. For better adhesion of coating layer, a new pretreatment method was developed. The scanning electron microscope (SEM), 3D profilometry and x-ray diffraction (XRD) results show that the coatings produced at bath temperatures of 30°C and 80°C are clearly distinct in thickness, composition, surface morphology and surface topography. The coating formed at 30°C has a higher carbide content, coating thickness and roughness, as well as a high degree of coating defect like cracks and pores, as compared to the crack-free coating electrodeposited at 80°C. From the XRD results, it is observed that amorphization of the Cr coating increases with decrease temperature. Finally, the electrochemical behavior of the coatings and the bare SS in 3.5 wt% NaCl environment were investigated with potentiodynamic polarization test. The results show that the localized (pitting) corrosion resistance of the 304L SS canister material is improved by the Cr coatings electrodeposited at 30°C and 80°C. Subsequently, pit quantification and characterization show that the coating produced at higher bath temperature has a better ability to suppress pitting and possibly chloride induced stress corrosion cracking (CISCC) than that produced at atmospheric temperature.

Product tags
Also Purchased
Picture for Sometime More Is Just More: THPS Biocide Laboratory Kill Study on Wildtype Sulfate Reducing Bacteria.
Available for download

Sometime More Is Just More: THPS Biocide Laboratory Kill Study on Wildtype Sulfate Reducing Bacteria.

Product Number: 51323-18858-SG
Author: J. Fajt
Publication Date: 2023
$20.00

Tetrakis(hydroxymethyl)-phosphonium Sulfate (THPS) is a very common active ingredient in oil and gas biocides. While product labels provide broad guidelines application dosing the lowest effective dose of THPS is difficult to determine. Site water chemistry and bacteria biology variability will affect the dose need to achieve the desired level of bacteria population control. For these reasons biocide dose response studies are commonly conducted on solutions containing bacteria to determine the effect of treatments before application.
Picture for An Integrated Probabilistic Approach to Predicting the Occurrence of Atmospheric Stress Corrosion Cracking of Dry Storage Canisters
Available for download

An Integrated Probabilistic Approach to Predicting the Occurrence of Atmospheric Stress Corrosion Cracking of Dry Storage Canisters

Product Number: 51323-18893-SG
Author: Aaron J. Stenta, Brandon R. Rollins, Gerald Young, Narasi Sridhar, Ramgopal Thodla
Publication Date: 2023
$20.00

Spent nuclear fuel (SNF) is currently stored in stainless steel dry storage canisters (DSCs) contained within concrete cask systems with passive ambient air cooling. These systems are emplaced, either horizontally or vertically, at independent spent fuel storage installations (ISFSIs), located at utility reactor sites. The ambient air introduces moisture, aerosolized salt particles, and dust to the canister surfaces. The composition of the aerosols depends on geographical factors, such as proximity to the ocean,
industrial area, rural areas, and transportation corridors that use road salt for winterization.
Picture for Investigating the thermal stability and corrosivity of biocrude oil at FCC feeding temperatures for co-processing applications
Available for download

Investigating the thermal stability and corrosivity of biocrude oil at FCC feeding temperatures for co-processing applications

Product Number: 51323-18895-SG
Author: Henry Pedraza, Yimin Zeng, Haoxiang Wang, Jing Liu, Xue Han
Publication Date: 2023
$20.00

Biomass, as a renewable energy source, can be converted into bio-oil (BO) via thermochemical conversion pathways. Among them, fast pyrolysis is the most common and the only industrially applied approach to convert dry biomass into BO. There are many advantages of using BO to replace traditional fossil fuels. For example, the amount of CO2 generated from biofuel combustion is close to that absorbed in raw biomass growth, leading to a net-zero carbon emission from energy production. BO combustion generates lower emissions of SOx and NOx compared to conventional fossil fuels.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support