Abstract: A method employing oxide film conversion coatings prepared using ferrate (VI) as the oxidizing agent is disclosed. Metal substrates or surfaces, such as aluminum, aluminum alloys or other metals, are contacted with an aqueous solution comprising ferrate (VI) anions to form a corrosion resistant conversion coating on the surface thereof. The ferrate anion concentration is preferably between about 0.0166% and about 1.66% by weight. The coating process is carried out by dipping, spraying, or painting at temperatures ranging from 25° C. to 100° C. for a period of time ranging from about 1 second to about 5 minutes.

Abstract: The present invention provides a conversion coating solution containing polymetalates and/or heteropolymetalates to oxidize the surface of various metal substrates. The polymetalates have the general formula MxOyn?, where M is selected from the group comprising Mo, V and W. The heteropolymetalates have the general formula BMxOyn?, where B is a heteroatom selected from P, Si, Ce, Mn or Co, and M is again selected from Mo, V, W or combinations thereof. The concentration of polymetalates and/or heteropolymetalates anions is preferably between about 1% and about 5% by weight. Examples of typical anions used include, but are not limited to, (PMo12O40)3?, (PMo10V2O40)5?, (MnPW11O39)5?, (PW12O40)3?, (SiMo12O40)4?, (SiW12O40)4?, (Mo7O24)6?, (CeMo12O42)8? and mixtures thereof.

Abstract: A biocompatible surgical implant or component for a surgical implant for use in human beings and animals is described. The implant has an oxide film-forming valve metal substrate, such as titanium, titanium alloy, zirconium, or zirconium alloy, or stainless steel, or cobalt-chromium-molybdenum alloy having a surface that has been treated such that phosphorous and oxygen are incorporated into the treated surface of the implant. The surface treatment carried out on the implant includes low temperature anodic treatment of the substrate in a phosphorus-containing solution, such as a phosphate-containing solution. The anodic treatment changes or modifies the substrate surface through electrochemical reactions between the substrate, acting as an anode, and phosphate ions contained in an electrolyte solution, such as provided by an aqueous solution of phosphoric acid. The phosphorus-containing solution may be substantially calcium-free.

Abstract: A biocompatible surgical implant for use in human beings and animals. The implant has a titanium or titanium alloy substrate having a surface that has been treated with phosphates. The surface treatment on the implant includes low temperature anodic phosphation of the titanium or titanium alloy substrate. Anodic phosphation changes or modifies the substrate surface through electrochemical reactions between the substrate, acting as an anode, and phosphate ions contained in an electrolyte solution, such as provided by an aqueous solution of phosphoric acid, and water molecules. The surface treatment imparts no significant change in the dimensions of the implant, thereby allowing the surgical implant substrate to be constructed to exact dimensions without having to account for the thickness of additional coatings being applied to the implant.

Abstract: A biocompatible surgical implant for use in human beings and animals. The implant has a titanium or titanium alloy substrate having a surface that has been treated with phosphates. The surface treatment on the implant includes low temperature anodic phosphation of the titanium or titanium alloy substrate. Anodic phosphation changes or modifies the substrate surface through electrochemical reactions between the substrate, acting as an anode, and phosphate ions contained in an electrolyte solution, such as provided by an aqueous solution of phosphoric acid, and water molecules. The surface treatment imparts no significant change in the dimensions of the implant, thereby allowing the surgical implant substrate to be constructed to exact dimensions without having to account for the thickness of additional coatings being applied to the implant.

Abstract: The present invention provides a conversion coating solution containing polymetalates and/or heteropolymetalates to oxidize the surface of various metal substrates. The polymetalates have the general formula MxOyn−, where M is selected from the group comprising Mo, V and W. The heteropolymetalates have the general formula BMxOyn−, where B is a heteroatom selected from P, Si, Ce, Mn or Co, and M is again selected from Mo, V, W or combinations thereof. The concentration of polymetalates and/or heteropolymetalates anions is preferably between about 1% and about 5% by weight. Examples of typical anions used include, but are not limited to, (PMo12O40)3−, (PMo10V2O40)5−, (MnPW11O39)5−, (PW12O40)3−, (SiMo12O40)4−, (SiW12O40)4−, (Mo7O24)6−, (CeMo12O42)8−and mixtures thereof.

Abstract: A method employing oxide film conversion coatings prepared using ferrate (VI) as the oxidizing agent is disclosed. Metal substrates or surfaces, such as aluminum, aluminum alloys or other metals, are contacted with an aqueous solution comprising ferrate (VI) anions to form a corrosion resistant conversion coating on the surface thereof. The ferrate anion concentration is preferably between about 0.0166% and about 1.66% by weight. The coating process is carried out by dipping, spraying, or painting at temperatures ranging from 25° C. to 100° C. for a period of time ranging from about 1 second to about 5 minutes.

Abstract: The present invention provides a conversion coating solution containing polymetalates and/or heteropolymetalates to oxidize the surface of various metal substrates. The polymetalates have the general formula MxOyn−, where M is selected from the group comprising Mo, V and W. The heteropolymetalates have the general formula BMxOyn−, where B is a heteroatom selected from P, Si, Ce, Mn or Co, and M is again selected from Mo, V, W or combinations thereof. The concentration of polymetalates and/or heteropolymetalates anions is preferably between about 1% and about 5% by weight. Examples of typical anions used include, but are not limited to, (PMo12O40)3−, (PMo10V2O40)5−, (MnPW11O39)5−, (PW12O40)3−, (SiMo12O40)4−, (SiW12O40)4−, (Mo7O24)6−, (CeMo7O24)8−and mixtures thereof.

Abstract: A method employing oxide film conversion coatings prepared using ferrate (VI) as the oxidizing agent is disclosed. Metal substrates or surfaces, such as aluminum, aluminum alloys or other metals, are contacted with an aqueous solution comprising ferrate (VI) anions to form a corrosion resistant conversion coating on the surface thereof. The ferrate anion concentration is preferably between about 0.0166% and about 1.66% by weight. The coating process is carried out by dipping, spraying, or painting at temperatures ranging from 25° C. to 100° C. for a period of time ranging from about 1 second to about 5 minutes.