scholarly journals Electrochemical Behavior of Plasma-Sprayed Stainless Steel

2019 ◽  
Vol 9 (1S4) ◽  
pp. 892-895
Keyword(s):  
Stainless Steel ◽  
Electrochemical Behavior ◽  
Surface Characterization ◽  
Corrosion Potential ◽  
Coated Sample ◽  
Nacl Solution ◽  
Stainless Steel 316L ◽  
Polarization Studies ◽  
Characterization Studies ◽  
Plasma Sprayed

The effect of electrochemical behavior of plasma sprayed NiCr–Cr2O3 (80:20) and Al2O3– 40% TiO2 as coating on stainless steel 316L were investigated. The polarization studies were carried out in 1.0M H2SO4 and 3.5% NaCl solution as a corrosive medium. The corrosion potential is more positive in the coated sample and gives good corrosion resistance when compared to bare sample. The surface characterization studies were carried out through electron microscope attached with energy dispersive spectroscopy. It was found that intergranular attack and pitting corrosion takes place in the sample exposed in 1.0M H2SO4 and large crater was found in the sample exposed in 3.5% NaCl solution.

scholarly journals Electrochemical behavior of stainless steel alloys used for medical and dental applications as a function of exposure to 0.9% NaCl and sterilization

2021 ◽  
Vol 10 (5) ◽  
pp. e32810513544
Author(s):  
Cecília Alves de Sousa ◽  
Carolina Ferrairo Danieletto-Zanna ◽  
Thamara Beline ◽  
Gustavo Zanna Ferreira ◽  
Leonardo Perez Faverani ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Electrochemical Behavior ◽  
Surface Characterization ◽  
Electrochemical Impedance ◽  
Open Circuit ◽  
Surgical Instruments ◽  
Nacl Solution ◽  
Steel Alloys ◽  
Significance Level

This study evaluated the effect of disinfection procedures and exposure to 0.9% NaCl solution cycles during sterilization, on the electrochemical, physical and chemical properties of different stainless steel alloys used in the biomedical field. Discs of F899 XM16, F899 303, and F899 420B alloys were cleaned with enzymatic detergent followed by 20 cycles of autoclave sterilization. Electrochemical tests were performed including open circuit potential, electrochemical impedance spectroscopy, and potentiodynamic polarization tests in 0.9% NaCl (n=5). Surface characterization was performed using scanning electron microscopy (SEM), energy dispersive spectroscopy, and surface roughness and microhardness both before and after the electrochemical test. Quantitative data were analyzed with a significance level of 5%. The corrosion current density and corrosion potential of the alloys did not present statistical differences. The capacitance values of the three oxide layers, polarization resistance, and impedance of Warburg were similar among the alloys. Considering the topography, surface roughness increased for all alloys in the post-corrosion period. The stainless steel alloys analyzed were negatively affected at the electrochemical behavior, corrosion kinetics, and surface characterization after the 0.9% NaCl solution and the autoclave sterilization cycles, confirming the need for regular exchanges of surgical instruments and drills used in medical and dental implantology.

scholarly journals Post-Processing and Surface Characterization of Additively Manufactured Stainless Steel 316L Lattice: Implications for BioMedical Use

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1376
Author(s):  
Alex Quok An Teo ◽  
Lina Yan ◽  
Akshay Chaudhari ◽  
Gavin Kane O’Neill
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Surface Characterization ◽  
High Surface ◽  
Surface Characteristics ◽  
Post Processing ◽  
Stainless Steel 316L ◽  
Processing Methods ◽  
Particulate Debris

Additive manufacturing of stainless steel is becoming increasingly accessible, allowing for the customisation of structure and surface characteristics; there is little guidance for the post-processing of these metals. We carried out this study to ascertain the effects of various combinations of post-processing methods on the surface of an additively manufactured stainless steel 316L lattice. We also characterized the nature of residual surface particles found after these processes via energy-dispersive X-ray spectroscopy. Finally, we measured the surface roughness of the post-processing lattices via digital microscopy. The native lattices had a predictably high surface roughness from partially molten particles. Sandblasting effectively removed this but damaged the surface, introducing a peel-off layer, as well as leaving surface residue from the glass beads used. The addition of either abrasive polishing or electropolishing removed the peel-off layer but introduced other surface deficiencies making it more susceptible to corrosion. Finally, when electropolishing was performed after the above processes, there was a significant reduction in residual surface particles. The constitution of the particulate debris as well as the lattice surface roughness following each post-processing method varied, with potential implications for clinical use. The work provides a good base for future development of post-processing methods for additively manufactured stainless steel.

Effect of ECAP on the Electrochemical Behavior of Chromium Bronze

2011 ◽  
Vol 239-242 ◽  
pp. 98-101
Author(s):  
Ya Ni Zhang ◽  
Chang Zheng Xu ◽  
Mao Sheng Zheng ◽  
Jie Wu Zhu
Keyword(s):  
Electrochemical Behavior ◽  
Corrosion Potential ◽  
Nacl Solution ◽  
Angular Pressing ◽  
Fine Grain ◽  
Ecap Process ◽  
Electrode Cell ◽  
Cold Rolled ◽  
Chromium Bronze ◽  
The Difference

The effect of equal channel angular pressing (ECAP) process on the electrochemical behavior of chromium bronze in NaCl solution was investigated by three-electrode cell setup. The result shows the difference of electrochemical behavior between X plane and Y plane is still exist, and even in the unodd number passes for “route C” of ECAP process. ECAP process don’t change the corrosion nature of chromiun bronze, but the corrosion potential of 12 passes ultra-fine grain (UFG) chromium bronze is a little more positive than that of 0 pass chromium bronze. For better understanding the effect of ECAP on the electrochemical behavior of chromium bronze, we chose the cold-rolled materials with the same composition as reference materials. The result shows that ECAP process is more benefical to electrochemical behavior of chromium bronze than cold-rolled process. On the other hand, the result of EIS also shows that ECAP process is more benefical to form compacted corrosion layers on the surface of specimens.

Electrochemical behavior of thermally sprayed stainless steel coatings in 3.4% NaCl solution

2005 ◽  
Vol 47 (3) ◽  
pp. 605-620 ◽  
Author(s):  
P.H. Suegama ◽  
C.S. Fugivara ◽  
A.V. Benedetti ◽  
J. Fernández ◽  
J. Delgado ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Electrochemical Behavior ◽  
Nacl Solution ◽  
Stainless Steel Coatings ◽  
Thermally Sprayed

Electrochemical Behavior of Welded Joints with 308L Stainless Welding Wire and Low Temperature Transformation Welding Wire

2011 ◽  
Vol 418-420 ◽  
pp. 1392-1395
Author(s):  
Sen Zhao ◽  
Hong Yang Jing ◽  
Yong Dian Han ◽  
Lian Yong Xu
Keyword(s):  
Corrosion Resistance ◽  
Low Temperature ◽  
Electrochemical Behavior ◽  
Welded Joints ◽  
Corrosion Potential ◽  
Nacl Solution ◽  
Welding Wire ◽  
Temperature Transformation ◽  
Welding Processes ◽  
Better Than

The electrochemical behavior of welded joints with 308L stainless solid welding wire and low temperature transformation welding wire using different welding processes was investigated at ambient temperature in 3.5% NaCl solution using potentiodynamic polarisation technique. Welded joints exhibited different corrosion potential due to the dilutions of alloy elements such as Cr, Ni, Ti, Nb and Mo. To reveal the corrosion resistance of welded joints using different welding processes, some significant characterization parameters such as Ecorr, Eb, △E and Icorr in polarisation curves were analyzed and compared. The result shows that the corrosion resistance of welded joints using low temperature transformation welding wire is better than that using 308L stainless solid welding wire.

Micro Laser Joining between Dissimilar Materials of 200μm Thick TiNi Alloy and Stainless Steel and the Joint’s Electrochemical Behavior

2015 ◽  
Vol 645-646 ◽  
pp. 388-393
Author(s):  
Yu Hua Chen ◽  
Ji Lin Xie ◽  
Wei Huai Gong
Keyword(s):  
Stainless Steel ◽  
Pitting Corrosion ◽  
Electrochemical Behavior ◽  
Corrosion Potential ◽  
Welded Joint ◽  
Ph Value ◽  
Dissimilar Materials ◽  
Filler Material ◽  
Tini Alloy ◽  
Surface Stability

Dissimilar materials between TiNi shape memory alloy (SMA) and stainless steel of 200μm mm thick were butt welded by micro impulse laser and the electrochemical behavior of the weld joints was studied. The results show that the crack sensitivity of the welded joint is very high and good joining between TiNi SMA and stainless steel can be realized with pure Ni wire as filler material presented between TiNi SMA and stainless steel. The tensile strength of the welded joint with pure Ni wire as filler material is 580MPa. The electrochemical tests of the welded joints in different concentrations of NaCl solutions and different pH value solutions show that, the maximum of the corrosion potential Ecorr in the three typical corrosion systems (0.9%NaCl, pH=7.3; 3.5%NaCl, pH=7.3; 0.9%NaCl, pH=4) is the weld seam, which indicates that the corrosion tendency of the weld is smaller than that of TiNi alloy and stainless steel in the three corrosion systems. The pitting corrosion potential of TiNi alloy, stainless steel and the weld gradually decreased with the increase of Cl-concentration; the pitting corrosion potential decreased with the increase of H+ concentration, while TiNi alloy decreased faster than that of the weld and stainless steel, the surface stability of TiNi alloy is low when pH value dropped below 7.

Sign in / Sign up

Export Citation Format

Share Document