摘要:
In one embodiment, the invention provides a composition useful for passivating a metal surface, in particular a zinciferous surface, comprising, preferably consisting essentially of, most preferably consisting of water and: (A) dissolved phosphate ions; (B) dissolved trivalent chromium ions; (C) dissolved anions of at least one complex fluoride of an element selected from the group consisting of Ti, Zr, Hf, Si, Sn, Al, Ge and B; preferably Ti, Si and/or Zr; (D) an optional component of dissolved free fluoride ions; (E) organic acid inhibitor, preferably comprising quaternary ammonium compounds; and, optionally (F) a pH adjusting component; and optionally organic hydroxyl acids.
摘要:
In one embodiment, the invention provides a composition useful for passivating a metal surface, in particular a zinciferous surface, comprising, preferably consisting essentially of, most preferably consisting of water and: (A) dissolved phosphate ions; (B) dissolved trivalent chromium ions; (C) dissolved anions of at least one complex fluoride of an element selected from the group consisting of Ti, Zr, Hf, Si, Sn, Al, Ge and B; preferably Ti, Si and/or Zr; (D) an optional component of dissolved free fluoride ions; (E) organic acid inhibitor, preferably comprising quaternary ammonium compounds; and, optionally (F) a pH adjusting component; and optionally organic hydroxyl acids.
摘要:
A chromium free conversion coating at least equivalent in corrosion protective quality to conventional chromate conversion coatings can be formed on metals, particularly cold rolled steel, by a dry-in-place aqueous acidic liquid that preferably has a pH value between 0.5 and 5.0 and comprises: (A) “fluorometallate” anions consisting of (i) at least four fluorine atoms, (ii) at least one atom of an element selected from the group consisting of titanium, zirconium, hafnium, silicon, aluminum, and boron, and, optionally, one or more of (iii) ionizable hydrogen atoms and (iv) oxygen atoms; (B) a component of divalent or tetravalent cations of elements selected from the group consisting of cobalt, magnesium, manganese, zinc, nickel, tin, copper, zirconium, iron, and strontium in such an amount that the ratio of the total number of cations of this component to the number of anions in component (A) is at least about 1:5 but not greater than about 3:1; (C) a component selected from the group consisting of phosphorus-containing inorganic oxyanions and phosphonate anions; and (D) a component of polymers of hydroxy styrene, modified by substitution on the aromatic rings of the polymers of substituted aminomethyl moieties, in which the substituents (other than the carbon atom that is directly bonded to an aromatic ring in the polymer) on the amino nitrogen atom jointly contain at least two carbon atoms and at least one hydroxy moiety but neither of these substituents on the amino nitrogen atom individually contains more than half as many hydroxyl moieties as it has carbon atoms, unless it contains only one carbon atom.
摘要:
A metal treatment solution comprising an effective amount of a soluble or dispersible compound which is a derivative of a polyphenol. A composition for treatment and after treatment of metal with polyphenol compounds is provided. The present invention includes novel derivatives of polyphenol compounds which are useful in surface treatment solutions of dispersions. A method for using these solutions or dispersions is also provided. The molecular weight of the polyphenols used to form the derivatives of the present invention are in the range of from about 360 to 30,000 or greater. The resulting derivatives of the present invention typically have a molecular weight of up to about 2,000,000 with molecular weights within the range of about 700 to about 70,000 being preferred.
摘要:
The invention is a process for removing a chromium containing coating from an aluminum article. The chromium containing coating is removed from the aluminum article by contacting the aluminum article having the chromium containing coating with an alkaline treating bath to form an ultrasonically removable chromium containing coating and treating the aluminum article with the ultrasonically removable coating with ultrasonic vibrations to remove the chromium containing coating.
摘要:
A metal treatment solution comprising an effective amount of a soluble or dispersible compound which is a derivative of a polyphenol. The present invention comprises novel derivatives of polyphenol compounds useful in the treatment of the surface of metal articles. The present invention also encompasses novel surface treatment solutions or dispersions, and methos of using these solutions or dispersions. The compositions of the present invention include amine oxide containing polyphenol compounds and derivatives thereof. The molecular weight of the polyphenols used in derivatives of the present invention have molecular weights of from about 360 to about 30,000 or greater. The resulting derivatives of the present invention typically have a molecular weight of up to about 2,000,000 with molecular weights within the range of about 700 to about 70,000 being preferred.
摘要:
Aqueous corrosion inhibitor compositions, preferably storage-stable, useful in acidic cleaning solutions for cleaning the surfaces of metal, comprising reaction products of at least one rosin amine component, at least one non-flammable liquid ketone component, at least one carboxylic acid component, at least one paraformaldehyde component and water; aqueous acidic cleaners prepared therefrom; and methods of their use. The inventive corrosion inhibitor compositions are made by a simple process which reduces the presence of toxic and/or flammable raw materials, co-products, residual reactants and chloride ion while providing acid inhibition in aqueous acidic cleaners.
摘要:
To improve at least one of the hydrophilicity, corrosion resistance, and adhesion by subsequently applied paints, a solid surface, preferably an aluminum alloy surface, is treated with an initial treatment liquid that comprises water and dissolved, dispersed or both dissolved and dispersed polymers that include substantial mass fractions of benzene rings that are substituted with at least one oxygen atom and at least one substituted aminomethylene moiety on each ring, and then treated with a secondary treatment liquid that comprises water and vanadate anions.
摘要:
A composition and method for coating and touching up a metal surface is provided. The composition contains from about 0.5 to about 240 millimoles per kilograms of a fluorometallate ion, from about 0.5 grams/liters to about 10 grams/liter of phosphorous-containing inorganic oxy anions calculated at their stoichiometric equivalent as H3PO4; from about 0.05 g/l to about 3.5 g/l of hexavalent chromium and from about 0.10 g/l to about 2.20 g/l of trivalent chromium ions.
摘要:
A metal treatment solution comprising an effective amount of a soluble or dispersible compound which is a derivative of a polyphenol. A composition for treatment and after treatment of metal with polyphenol compounds is provided. The present invention includes novel derivatives of polyphenol compounds which are useful in surface treatment solutions or dispersions. A method for using these solutions or dispersions is also provided. The molecular weight of the polyphenols used to form the derivatives of the present invention are in the range of from about 360 to 30,000 or greater. The resulting derivatives of the present invention typically have a molecular weight of up to about 2,000,000 with molecular weights within the range of about 700 to about 70,000 being preferred.