Electrochemical corrosion resistance of CeO2-Cr/Ti coatings on 304 stainless steel via pack cementation

2015 ◽  
Vol 33 (10) ◽  
pp. 1122-1128 ◽  
Author(s):  
Xuegang XING ◽  
Zhijun HAN ◽  
Hefeng WANG ◽  
Panna LU
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Electrochemical Corrosion ◽  
Pack Cementation ◽  
304 Stainless Steel ◽  
Electrochemical Corrosion Resistance

scholarly journals Microstructure and Corrosion Resistance of Underwater Laser Cladded Duplex Stainless Steel Coating after Underwater Laser Remelting Processing

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4965
Author(s):  
Congwei Li ◽  
Jialei Zhu ◽  
Zhihai Cai ◽  
Le Mei ◽  
Xiangdong Jiao ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Phase Composition ◽  
Duplex Stainless Steel ◽  
Electrochemical Corrosion ◽  
Chemical Components ◽  
Laser Remelting ◽  
Underwater Environment ◽  
Underwater Laser ◽  
Electrochemical Corrosion Resistance

Combined with the technologies of underwater local dry laser cladding (ULDLC) and underwater local dry laser remelting (ULDLR), a duplex stainless steel (DSS) coating has been made in an underwater environment. The phase composition, microstructure, chemical components and electrochemical corrosion resistance was studied. The results show that after underwater laser remelting, the phase composition of DSS coating remains unchanged and the phase transformation from Widmanstätten austenite + intragranular austenite + (211) ferrite to (110) ferrite occurred. The ULDLR process can improve the corrosion resistance of the underwater local dry laser cladded coating. The corrosion resistance of remelted coating at 3 kW is the best, the corrosion resistance of remelted coating at 1kW and 5kW is similar and the corrosion resistance of (110) ferrite phase is better than grain boundary austenite phase. The ULDLC + ULDLR process can meet the requirements of efficient underwater maintenance, forming quality control and corrosion resistance. It can also be used to repair the surface of S32101 duplex stainless steel in underwater environment.

scholarly journals In Vitro Corrosion and Haemocompatibility of Bulk Nanocrystalline 304 Stainless Steel by Severe Rolling

2010 ◽  
Vol 667-669 ◽  
pp. 1113-1118 ◽  
Author(s):  
Fei Long Nie ◽  
Yan Bo Wang ◽  
Shi Cheng Wei ◽  
Yu Feng Zheng ◽  
Sheng Gang Wang
Keyword(s):  
Stainless Steel ◽  
Platelet Rich Plasma ◽  
Electrochemical Corrosion ◽  
304 Stainless Steel ◽  
Cellular Interaction ◽  
Ion Release ◽  
Bulk Nanocrystalline ◽  
Electrochemical Corrosion Resistance ◽  
Hank’S Solution

Bulk nanocrystalline 304 stainless steel (nanocrystalline 304ss) discs had been successfully prepared by the commercial microcrystalline 304 stainless steel (microcrystalline 304ss) plate using severe rolling technique. Micro-hardness was measured to reveal the different mechanical behavior after the severe plastic deformation. The electrochemical corrosion resistance and ion release behavior after immersion of the samples were investigated in Hank’s solution for its potential use as implant and orthodontic appliance in body. Furthermore, murine fibroblast cells were indirectly employed to detect cytotoxicity by co-incubation with the extraction from the given materials. Haemocompatibility, consisting of hemolysis test and adhesion of the platelets, was also measured with fresh human whole blood and platelet-rich plasma respectively. Polarization resistance trials indicate that nanocrystalline 304ss is more corrosion resistant in the Hank’s solution, with lower current density and superficial corrosion morphologies. The release values of the biotoxic ions after immersion do not exceed the set limit and turn to be well below the critical value necessary to induce allergy and below daily dietary intake level. Cellular interaction is observed via the proliferated feature of the cell line. Hemolysis and platelet adhesion results elucidates that nanocrystalline 304ss is biological and hematologic compatible.

Electrochemical corrosion resistance of thermal oxide formed on anodized stainless steel

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Hongda Deng ◽  
Yongliang Liu ◽  
Zhen He ◽  
Xiantao Gou ◽  
Yefan Sheng ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Design Methodology ◽  
Electrochemical Corrosion ◽  
Constant Density ◽  
Content Type ◽  
Thermal Oxide ◽  
Pitting Corrosion Resistance ◽  
Dynamic Potential ◽  
Electrochemical Corrosion Resistance

Purpose The purpose of this paper is to investigate and explain thermal oxide effect on electrochemical corrosion resistance anodized stainless steel (SS). Design/methodology/approach Electrochemical corrosion resistance of thermal oxides produced on anodized 304 SS in air at 350°C, 550°C, 750°C and 950°C in 3.5 wt.% NaCl solution have been investigated by dynamic potential polarization, EIS and double-loop dynamic polarization. Anodized 304 SS were obtained by anodization at the constant density of 1.4 mA.cm-2 in the solution containing 28.0 g.L-1H3PO4, 20.0 g.L-1C6H8O7, 200.0 g.L-1H2O2 at 70°C for 50 min. SEM and EDS had been also used to characterize the thermal oxides and passive oxide. Findings Interestingly, anodized 304SS with thermal oxide produced at 350°C displayed more electrochemical corrosion and pitting resistance than anodized 304 SS only with passive oxide, as related to the formation of oxide film with higher chromium to iron ratio. Whereas, anodized 304SS with thermal oxide formed at 950°C shows the worse electrochemical corrosion and pitting resistance among those formed at the high temperatures due to thermal oxide with least compact. Originality/value When thermally oxidized in the range of 350°C–950°C, electrochemical corrosion and pitting corrosion resistance of anodized 304 SS decrease with the increase of temperature due to less compactness, more defects of thermal oxide.

Investigation of microstructure and corrosion resistance of AISI 304 stainless steel joint with ER308 and ERNiCr-3 filler metals by GTAW

2020 ◽  
Vol 117 (5) ◽  
pp. 507
Author(s):  
Mostafa Jafarzadegan ◽  
Fateh Ahmadian ◽  
Vahid Salarvand ◽  
Souren Kashkooli
Keyword(s):  
Corrosion Resistance ◽  
Filler Metal ◽  
Weld Zone ◽  
Electrochemical Corrosion ◽  
Impedance Analysis ◽  
304 Stainless Steel ◽  
Aisi 304 ◽  
Tafel Polarization ◽  
Electrochemical Corrosion Resistance ◽  
Filler Metals

In this study, the effect of two different filler metals (ERNiCr-3 and ER308) on microstructure and corrosion resistance of gas tungsten arc welded AISI 304 has been investigated. The microstructure of the joints was investigated by optical and scanning electron microscope. The microhardness of samples was investigated to determine the mechanical properties of the welds. Also, the electrochemical corrosion resistance of the samples was studied by Tafel polarization and impedance analysis in 1 M hydrochloric acid. The results showed the niobium-rich carbides in the welded specimen by ERNiCr-3 filler, also this sample exhibited a higher hardness and corrosion resistance. The exchange current density and the polarization radius of the ERNiCr-3 filler metal were 0.069 mA and 244 Ω, and those of ER308 filler metal were 0.121 mA and 66 Ω, respectively. The higher hardness and corrosion resistance is attributed to the formation of hard niobium-rich carbides in the weld zone, which eliminates the formation of chromium carbides.

OUTOKUMPU TYPE 630

Alloy Digest ◽  
2016 ◽  
Vol 65 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
High Performance ◽  
High Strength ◽  
Heat Treating ◽  
304 Stainless Steel ◽  
Type 304 ◽  
Type 304 Stainless Steel

Abstract Outokumpu Type 630 is a martensitic age hardenable alloy of composition 17Cr-4Ni. The alloy has high strength and corrosion resistance similar to that of Type 304 stainless steel. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-1238. Producer or source: Outokumpu High Performance Stainless.

Effect of RF plasma nitriding time on microhardness and corrosion resistance of 304 stainless steel

1992 ◽  
Vol 59 (3-4) ◽  
pp. 253-260 ◽  
Author(s):  
M.M. Ibrahim ◽  
F.M. El-Hossary ◽  
N.Z. Negm ◽  
M. Abed ◽  
R.E. Ricker
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Plasma Nitriding ◽  
304 Stainless Steel ◽  
Rf Plasma ◽  
Nitriding Time
Sign in / Sign up

Export Citation Format

Share Document