scholarly journals Study on a Superhydrophobic Stainless Steel (SUS 304) Surface to Enhance Corrosion Resistance

2021 ◽  
Vol 59 (4) ◽  
pp. 217-222
Author(s):  
Youngju Park ◽  
Chanyoung Jeong
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Nuclear Power ◽  
Water Repellency ◽  
Industrial Applications ◽  
Surface Shape ◽  
Water Repellent ◽  
Anode Electrode ◽  
Corrosion Behaviors ◽  
Electronic Parts

Stainless steel is a metal with excellent workability, economy, and corrosion resistance, so it is used in various industrial applications including the marine, machinery, electronic parts, piping, power generation, and nuclear power fields. However, in contaminated environments such as marine and gas pipelines, stainless steel has problems, including surface aging and corrosion. Several surface treatment methods have been proposed to address those problems. This study was conducted to observe the water repellency and corrosion resistance of a superhydrophobic phosphorylated film on the surface of stainless steel. The anodization was carried out using a step-by-step process under voltage in an ethylene glycol electrolyte, at 30, 50, and 70 V for 3 hours, respectively. The distance between the anode electrode and cathode electrode was maintained at 5 cm. A water-repellent surface was achieved using a FDTS (1H, 1H, 2H, 2H-Perfluorodecyltrichlorosilane) solution, a material with low energy, on the surface of the fabricated specimen. A Field Emission Scanning Electron Microscope (FE-SEM) was used to analyze the surface shape of the structure, and water repellency was analyzed using an angle meter. The corrosion behaviors of the electrochemical oxide film were investigated through polarization experiments.

scholarly journals Susceptibility to Stress Corrosion of Laser-Welded Composite Arch Wire in Acid Artificial Saliva

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
Chao Zhang ◽  
Xinhua Sun
Keyword(s):  
Weight Loss ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Shape Memory Alloy ◽  
Artificial Saliva ◽  
Steel Wire ◽  
Niti Shape Memory Alloy ◽  
Solution Ph ◽  
Corrosion Behaviors ◽  
Cu Interlayer

The corrosion resistance of laser-welded composite arch wire (CoAW) with Cu interlayer between NiTi shape memory alloy and stainless steel wire in artificial saliva with different acidities and loads was studied. It was found that both the solution pH and the stress had a significant influence on the corrosion behaviors of the CoAW samples. Decreasing the solution pH or increasing the loading stress caused the increase of Cu release and weight loss. The corroded morphology formed on the surfaces of the CoAW was the consequence under the combined effect of corrosion and stress.

scholarly journals Effect of Plasma Nitriding Process Conditions on Corrosion Resistance of 440B Martensitic Stainless Steel

2014 ◽  
Vol 8 (3) ◽  
pp. 156-159 ◽  
Author(s):  
Magdalena Łępicka ◽  
Małgorzata Grądzka-Dahlke
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Degradation Products ◽  
Plasma Nitriding ◽  
Electrochemical Corrosion ◽  
Industrial Applications ◽  
Process Conditions ◽  
Corrosion Properties ◽  
Dental Instruments ◽  
Increased Risk

Abstract Martensitic stainless steels are used in a large number of various industrial applications, e.g. molds for plastic injections and glass moldings, automotive components, cutting tools, surgical and dental instruments. The improvement of their tribological and corrosion properties is a problem of high interest especially in medical applications, where patient safety becomes a priority. The paper covers findings from plasma nitrided AISI 440B (PN-EN or DIN X90CrMoV18) stainless steel corrosion resistance studies. Conventionally heat treated and plasma nitrided in N2:H2 reaction gas mixture (50:50, 65:35 and 80:20, respectively) in two different temperature ranges (380 or 450°C) specimens groups were examined. Microscopic observations and electrochemical corrosion tests were performed using a variety of analytical techniques. As obtained findings show, plasma nitriding of AISI 440B stainless steel, regardless of the process temperature, results in reduction of corrosion current density. Nevertheless, applying thermo-chemical process which requires exceeding temperature of about 400°C is not recommended due to increased risk of steel sensitization to intergranular and stress corrosion. According to the results, material ion nitrided in 450°C underwent leaching corrosion processes, which led to significant disproportion in chemical composition of the corroded and corrosion-free areas. The authors suggest further research into corrosion process of plasma nitrided materials and its degradation products.

Effects of cold deformation on electrochemical corrosion behaviors of 304 stainless steel

2017 ◽  
Vol 64 (2) ◽  
pp. 252-262 ◽  
Author(s):  
Jiamei Wang ◽  
Le Fu Zhang
Keyword(s):  
Stainless Steel ◽  
Nuclear Power ◽  
Cold Deformation ◽  
Water Environment ◽  
Electrochemical Corrosion ◽  
Pressurized Water ◽  
Content Type ◽  
304 Austenitic Stainless Steel ◽  
Primary Water ◽  
Corrosion Behaviors

Purpose The purpose of this study was to investigate the effects of deformation-induced martensite on electrochemical corrosion behaviors of 304 austenitic stainless steel in a simulated primary water environment of a pressurized water reactor nuclear power plant with boric acid and lithium hydroxide contaminated with chloride by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), Mott–Schotty curves and X-ray photoelectron spectroscopy (XPS). Design/methodology/approach The effects of deformation-induced martensite transformation on electrochemical corrosion behaviors of 304 austenitic stainless steel was investigated in a simulated primary water environment of a pressurized water reactor nuclear power plant with boric acid and lithium hydroxide contaminated with 0.1 M Cl− by potentiodynamic polarization, EIS, Mott–Schotty curves and XPS in this paper. Findings The results revealed that the martensitic phase contents increased with the level of cold deformation. The general corrosion current density and the corrosion potential increased and decreased, respectively, with the increase of cold deformation degree. However, the pitting potential decreased as the cold deformation increased up to 20 per cent, then a slight increase was observed at 35 per cent cold working. It was found from Mott–Schottky curves and XPS analysis that as the cold deformation degree increased from 0 to 35 per cent, the doping concentrations of the oxide films increased; however, the film thickness decreased, which indicates that both density and integrity of the films are degraded significantly as the deformation degree increases, and this ultimately contributes to the significant increment of the general corrosion rate and reduction of the pitting corrosion resistance. Originality/value The effects of deformation-induced martensite transformation on electrochemical corrosion behaviors of 304 austenitic stainless steel was investigated in a simulated primary water environment of a pressurized water reactor nuclear power plant with boric acid and lithium hydroxide contaminated with 0.1 M Cl− by potentiodynamic polarization, EIS, Mott–Schotty curves and XPS in this paper.

EASTERN STAINLESS TYPE 317LM

Alloy Digest ◽  
1979 ◽  
Vol 28 (4) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Stainless Steels ◽  
Heat Treating ◽  
Industrial Applications ◽  
Low Carbon ◽  
Steel Company ◽  
Sulfurous Acid ◽  
Good Corrosion Resistance

Abstract EASTERN STAINLESS Type 317LM is an austenitic chromium-nickel stainless steel containing low carbon (0.03% max.) and relatively high molybdenum (4.00 to 4.5%). It was developed primarily to provide more resistance to attack by sulfurous acid than is provided by competitive conventional stainless steels. Its good corrosion resistance has extended its use to many other industrial applications. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-363. Producer or source: Eastern Stainless Steel Company.

EASTERN STAINLESS TYPE 317L

Alloy Digest ◽  
1984 ◽  
Vol 33 (11) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Stainless Steels ◽  
Heat Treating ◽  
Industrial Applications ◽  
The Other ◽  
Low Carbon ◽  
Steel Company ◽  
Sulfurous Acid ◽  
Temperature Performance

Abstract EASTERN STAINLESS Type 317L is an austenitic chromium-nickel stainless containing low carbon (0.03% max.) and an addition of molybdenum (3.00-4.00%). This steel was developed primarily to resist more effectively the attack by sulfurous acid than is provided by some of the other competitive stainless steels. Its proven ability to resist corrosion had broadened its use considerably and now it is used for many other industrial applications. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-453. Producer or source: Eastern Stainless Steel Company.

Welding of Stainless Steel - A Heavy Engineering Perspective

2013 ◽  
Vol 794 ◽  
pp. 380-390
Author(s):  
Krishnan Sivaraman ◽  
Dileep Kulkarni
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Stainless Steels ◽  
Wide Spectrum ◽  
Industrial Applications ◽  
Global Market ◽  
High Productivity ◽  
Wide Range ◽  
Welding Processes ◽  
Submerged Arc

Stainless steels are engineering materials capable of meeting a wide range of design criteria. They exhibit excellent corrosion resistance, strength at elevated temperature, toughness at cryogenic temperature and fabrication characteristics, and they are selected for a broad range of consumer, commercial, and industrial applications. In the fabrication of stainless steel products, components, or equipment, manufacturers employ welding as the principal joining method. Stainless steels possess good weldability and a welded joint can provide optimum corrosion resistance, strength, and fabrication economy provided reasonable care is exercised during welding. L&T's Heavy Engineering (HE) has established a reputation for quality products in the global market with its strong engineering capabilities and state-of-the-art manufacturing facilities. It manufactures and supplies various critical equipments like reactors, vessels, heat exchangers and inter-connecting piping to Fertilizer, Refinery, Petrochemical, Chemical, Oil & Gas, Power, Nuclear and allied Strategic sectors. The wide spectrum of equipments mentioned involves fabrication of various grades of Stainless Steel (SS)like Austenitic, Ferritic, Martensitic, Duplex, Super Duplex etc. This paper discusses some of the high productivity welding processes and the techniques being used in manufacturing Stainless Steel vessels at Larsen & Toubro’s Heavy Engineering such as: Narrow groove welding of high thickness SS joints by Submerged Arc Welding(SAW), High deposition SS weld surfacing using Electro Slag Strip Cladding (ESSC), Hotwire GTAW for joining & surfacing of SS, SS Liner welding by GTAW for critical Urea Service applications, Automatic Tube to Tube sheet Welding etc.

Developing Corrosion-Resistant Joints Applied in the Plate Heat Exchanger

2011 ◽  
Vol 410 ◽  
pp. 191-195
Author(s):  
C.H. Shu ◽  
H.W. Hsu ◽  
T.Y. Yeh ◽  
W.S. Chen ◽  
R.K. Shiue
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Industrial Applications ◽  
Plate Heat Exchanger ◽  
Corrosion Resistant ◽  
Plate Heat ◽  
316 Stainless Steel

The manufacturing of plate heat exchangers is much more difficult than that of making traditional heat exchangers. The demand of increased corrosion resistance, avoiding Cu ion contamination, resisting to high-temperature resulting from various applied environments makes the traditional Cu brazed 316 stainless steel (316SS) plate heat exchanger fail to satisfy certain applications. Corrosion-resistant brazed 316SS plate heat exchangers are successfully developed using two commercially available Ni-based brazing foils, and they are valuable for industrial applications.

scholarly journals Superhydrophobic Al2O3–Polymer Composite Coating for Self-Cleaning Applications

Coatings ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1162
Author(s):  
Rajaram S. Sutar ◽  
Saravanan Nagappan ◽  
Appasaheb K. Bhosale ◽  
Kishor Kumar Sadasivuni ◽  
Kang-Hyun Park ◽  
...  
Keyword(s):  
Composite Coating ◽  
Research Work ◽  
Water Repellency ◽  
Dip Coating ◽  
Industrial Applications ◽  
Water Repellent ◽  
Al2o3 Nanoparticles ◽  
Sliding Angle ◽  
Water Contact ◽  
Self Cleaning

Superhydrophobic coatings have a huge impact in various applications due to their extreme water-repellent properties. The main novelty of the current research work lies in the development of cheap, stable, superhydrophobic and self-cleaning coatings with extreme water-repellency. In this work, a composite of hydrothermally synthesized alumina (Al2O3), polymethylhydrosiloxane (PMHS) and polystyrene (PS) was deposited on a glass surface by a dip-coating technique. The Al2O3 nanoparticles form a rough structure, and low-surface-energy PHMS enhances the water-repellent properties. The composite coating revealed a water contact angle (WCA) of 171 ± 2° and a sliding angle (SA) of 3°. In the chemical analysis, Al2p, Si2p, O1s, and C1s elements were detected in the XPS survey. The prepared coating showed a self-cleaning property through the rolling action of water drops. Such a type of coating could have various industrial applications in the future.

Cladding of Tungsten Carbide and Stellite Using High Power Diode Laser to Improve the Surface Properties of Stainless Steel

2012 ◽  
Vol 585 ◽  
pp. 498-501 ◽  
Author(s):  
Raghuvir Singh ◽  
S.K. Tiwari ◽  
Suman K. Mishra
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Tungsten Carbide ◽  
Diode Laser ◽  
High Power ◽  
Surface Engineering ◽  
Industrial Applications ◽  
Engineering Technique ◽  
Power Diode ◽  
High Power Diode Laser

Surface engineering is one of the most viable methods, in addition to development of new alloys and equipment design, to minimize degradation due to cavitation erosion, and corrosion. Laser surface cladding is relatively a newer engineering technique to produce metallurgically bonded coating for industrial applications due to its inherent benefits. Present paper reports the results obtained on the laser cladding of stainless steel with tungsten carbide (WC) and stellite alloy powder using high power diode laser (HPDL) at various laser parameters. Cladded specimens were characterized for erosion, and corrosion resistance. Both WC and stellite cladding have increased the erosion resistance of stainless steels. WC cladding was found to reduce the corrosion resistance of steel while stellite showed it to increase significantly.

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