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Calcium ferrites obtained from electroplating sediments are useful as efficient anticorrosive pigments

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Chemically purified electroplating sediments contain Fe3O4 and CaO in stoichiometric ratios for synthesis of Ca ferrite crystalline salts. Products may be used as replacement for strontium chromate, lead silicate/chromate and other toxic pigments in anticorrosive coatings.

Calcium modified zinc phosphate coating

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Phosphating soln. contains Ca ions 0.4-2.0, Zn ion 0.2-1.5, PO4 ion 0.4-1.5, NO3 ion 3.0-10.0% w/v, with Ca: Zn ion ratio 1.0-3.5 and NO3:PO4 ion ratio 5-20. Soln. is used at 70-90°C for 20 s - 3min. Coating has good adhesion and appearance.

Calcium orthophosphate deposits: Preparation, properties and biomedical applications.

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Calcium Oxalate to Prevent Clogging of Anode Bags in Nickel Iron or Cobalt Plating

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Calcium phosphate coated article

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Coating metal substrate with aq. soln. of hydroxyapatite in HNO3, and firing at at least 300°C in inert atmos. or vacuum.

Calcium phosphate coated implantable medical devices, and electrophoretic deposition processes for making same.

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Slurry coating using electrophoretic deposition.

Calcium phosphate coated metal for implants

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Ti (alloy) or stainless steel is coated with aq. soln. of hydroxyapatite in 10-60% wt. HNO3 and heated at 300-4,800°C pref. in Ar or vacuum, to form coating of hydroxyapatite and by-product Ca phosphate. Metal has smooth or porous surface and may be roughened and/or etched before coating. Composite product is suitable for implants (artificial bones, dentures, etc.) or as cement therefore.

Calcium phosphate coating containing silver shows high antibacterial activity and low cytotoxicity and inhibits bacterial adhesion.

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Surgical site infection is one of the serious complications of orthopedic implants. In order to reduce the incidence of implant-associated infections, we developed a novel coating technology of calcium phosphate (CP) containing silver (Ag), designated Ag-CP coating, using a thermal spraying technique. In this study, we evaluated the antibacterial efficacy and biological safety of this coating. In vitro antibacterial activity tests showed that the growths of Escherichia coli, Staphylococcus aureus and methicillin-resistant S. aureus (MRSA) are completely suppressed on Ag-CP coating. In vitro bacterial adherence tests revealed that the number of adherent bacteria on the surface of this coating is significantly less (p < 0.02) than that on the surface of the CP coating. Moreover, the Ag-CP coating completely inhibits MRSA adhesion [<10 colony-forming units (CFU)] when 102 CFU MRSA is inoculated. On the other hand, V79 Chinese hamster lung cells were found to grow on the Ag-CP coating as well as on the CP coating in a cytotoxicity test. These results indicate that the Ag-CP coating on the surface of orthopedic implants exhibits antibacterial activity and inhibits bacterial adhesion without cytotoxicity.

Calcium Phosphate Coatings: A Comparative Study Between Simultaneous Vapor Deposition and Electron Beam Deposition Techniques.

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Calcium Phosphate Nucleation on Cellulose Fabrics.

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Calcium phosphate-encapsulated silver powder

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SURF Calcium phosphate encapsulated silver powder was obtained by heterogeneous nucleation during treatments of dispersed silver first with solutions of Ca(NO3)2 and then with Na2HPO4. Before treatment silver powders were functionalized with 3-mercaptopropionic acid and dispersed in a precipitation medium so the carboxylate groups could serve as nucleation sites. The ratio Ca/P in the coating increases with the number of treatment cycles. In contrast, calcium phosphate precipitation by slow release of phosphate ions via hydrolysis of tri(4-nitrophenyl)phosphate in a solution of Ca(NO3)2 results in homogeneous nucleation only; coating does not form on silver particles.

Calcium salt mixture as neutralizing agent for pickling with fluoride removal

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Calcium-hydroxide slurry processing for bioactive calcium-titanate coating on titanium.

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Calcium-Magnesium-Alumina-Silicate (CMAS) Delamination Mechanisms in EB-PVD Thermal Barrier Coatings.

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Calcium-magnesium-alumino-silicate (CMAS) degradation of EB-PVD thermal barrier coatings: Characterization of CMAS damage on ex-service high pressure blade TBCs.

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