ELECTROCHEMICAL BEHAVIOR OF STEEL ALLOYS AS AFFECTED BY PHOSPHORIC ACID

2008 ◽  
Vol 19 (Issue 1-A) ◽  
pp. 153-167
Author(s):  
A. AHMED ◽  
R. ABOU SHAHBA ◽  
IBRAHIME GHAYAD ◽  
E. ATTIA ◽  
W. HUSSEIN
Keyword(s):  
Phosphoric Acid ◽  
Electrochemical Behavior ◽  
Steel Alloys

Electrochemical Behavior of Porous Titanium Electrodes in Phosphoric Acid

2015 ◽  
Vol 51 (3) ◽  
pp. 429-435
Author(s):  
A. I. Kushmyruk ◽  
O. V. Kosohin ◽  
O. V. Linyucheva ◽  
V. A. Reveko ◽  
Yu. S. Miroshnychenko
Keyword(s):  
Phosphoric Acid ◽  
Electrochemical Behavior ◽  
Porous Titanium

Corrosion inhibition of steel in phosphoric acid

2018 ◽  
Vol 36 (3) ◽  
pp. 267-280 ◽  
Author(s):  
Anees A. Khadom ◽  
Salah N. Farhan
Keyword(s):  
Adsorption Isotherm ◽  
Synergistic Effect ◽  
Phosphoric Acid ◽  
Corrosion Inhibitors ◽  
Acid Corrosion ◽  
Industrial Applications ◽  
Mixed Effect ◽  
Steel Alloys ◽  
Organic Inhibitors ◽  
Anodic Reactions

AbstractPhosphoric acid has been used in many industrial applications and can be in contact with a lot chemical and petrochemical equipment. Most of this equipment is made of steel alloys that may be damaged because of contact with acid. Corrosion inhibitors can be used for to protect steel alloys against several forms and various environments of corrosion. In this paper, the efficiency and applications of organic and inorganic inhibitors in different environments of phosphoric acid are investigated. More than 40 papers were collected and reviewed. Surveys of the stated works in phosphoric acid environments are documented. It was concluded that organic inhibitors performed as good corrosion inhibitors and are used widely. The use of inorganic inhibitors was limited. Most of studied inhibitors follow Langmuir’s adsorption isotherm, and the mechanism of the inhibition can be ascribed to the mixed effect on cathodic and anodic reactions. The synergistic effect was also addressed in the present work.

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.

The Electrochemical Behavior of Phosphoric-Acid-Doped Poly(perfluorosulfonic Acid) Membranes

2014 ◽  
Vol 1 (9) ◽  
pp. 1471-1475 ◽  
Author(s):  
David Aili ◽  
Robert F. Savinell ◽  
Jens Oluf Jensen ◽  
Lars N. Cleemann ◽  
Niels J. Bjerrum ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Electrochemical Behavior ◽  
Perfluorosulfonic Acid ◽  
Perfluorosulfonic Acid Membranes
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