Copper Electropolishing in Concentrated Phosphoric Acid: I . Experimental Findings

1995 ◽  
Vol 142 (8) ◽  
pp. 2682-2689 ◽  
Author(s):  
Roberto Vidal ◽  
Alan C. West
Keyword(s):  
Phosphoric Acid ◽  
Experimental Findings ◽  
Copper Electropolishing

scholarly journals Adsorption Studies of the Effect of Thiosemicarbazides on the Corrosion of Steel in Phosphoric Acid

2000 ◽  
Vol 18 (3) ◽  
pp. 177-194 ◽  
Author(s):  
M.A. Ameer ◽  
E. Khamis ◽  
G. Al-Senani
Keyword(s):  
Phosphoric Acid ◽  
Active Sites ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Molecular Structures ◽  
Active Centre ◽  
Inhibitor Molecule ◽  
Thiosemicarbazide Derivatives ◽  
Experimental Findings ◽  
Corrosion Of Steel

The corrosion inhibition of steel in phosphoric acid by thiosemicarbazide derivatives has been studied using different chemical and electrochemical techniques. The observed order of increasing inhibition efficiency was correlated with changes in the molecular structures of the inhibitors. Potentiodynamic polarization curves indicate that the compounds are mixed-type inhibitors. Electrochemical impedance spectroscopy has been used successfully to evaluate the performance of the inhibitors. AC measurements showed that the dissolution process was activation-controlled. The kinetic–thermodynamic model and the Flory–Huggins adsorption isotherm described the experimental findings well. The number of active sites, binding constant and change in free energy were computed for all the inhibitors studied. It was found that the inhibitor molecule was adsorbed through more than one active centre and occupied more than one active site on the steel surface.

A Mechanistic Model for Copper Electropolishing in Phosphoric Acid

2008 ◽  
Vol 155 (1) ◽  
pp. D27 ◽  
Author(s):  
Julie Mendez ◽  
Rohan Akolkar ◽  
Tatyana Andryushchenko ◽  
Uziel Landau
Keyword(s):  
Phosphoric Acid ◽  
Mechanistic Model ◽  
Copper Electropolishing

The concerted use of SEM, TEM, and SCM for examination of resin-dentin interfaces

1994 ◽  
Vol 52 ◽  
pp. 476-477
Author(s):  
B. Van Meerbeek ◽  
L. J. Conn ◽  
E. S. Duke
Keyword(s):  
Surface Layer ◽  
Stress Distribution ◽  
Phosphoric Acid ◽  
Bonding Mechanism ◽  
Restorative Dentistry ◽  
Dental Adhesive ◽  
Low Viscosity ◽  
Dentin Adhesives ◽  
Acid Etch ◽  
Tooth Tissue

Restoration of decayed teeth with tooth-colored materials that can be bonded to tooth tissue has been a highly desirable property in restorative dentistry for many years. Advantages of such an adhesive restorative technique over conventional techniques using non-adhesive metal-based restoratives include improved restoration retention with minimal sacrifice of sound tooth tissue for retention purposes, superior adaptation and sealing of the restoration margins in prevention of caries recurrence, improved stress distribution across the tooth-restoration interface throughout the whole tooth, and even reinforcement of weakened tooth structures. The dental adhesive technology is rapidly changing. An efficient resin bond to enamel has already long been achieved. Its bonding mechanism has been fully elucidated and has proven to be a durable and reliable clinical treatment. However, bonding to dentin represents a greater challenge. After the failures of a dentin acid-etch technique in imitation of the enamel phosphoric-acid-etch technique and a bonding procedure based on chemical adhesion, modern dentin adhesives are currently believed to bond to dentin by a micromechanical hybridization process. This process is developed by an initial demineralization of the dentin surface layer with acid etchants exposing a collagen fibril arrangement with interfibrillar microporosities that subsequently become impregnated by low-viscosity monomers. Although the development of such a hybridization process has well been documented in the literature, questions remain with respect to parameters of-primary importance to adhesive efficacy.

Phosphoric Acid from Slags

1884 ◽  
Vol 18 (457supp) ◽  
pp. 7298-7298
Author(s):  
C. Scheibler
Keyword(s):  
Phosphoric Acid

MOTIONS IN A VISCOUS INORGANIC LIQUID : FERROUS ION IN COLD PHOSPHORIC ACID

1976 ◽  
Vol 37 (C6) ◽  
pp. C6-739-C6-743 ◽  
Author(s):  
P. A. FLINN ◽  
B. J. ZABRANSKY ◽  
S. L. RUBY
Keyword(s):  
Phosphoric Acid ◽  
Ferrous Ion
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