| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 148264000 | Contains an atom of chromium | 13 |
| 20090032145 | Method of forming a multilayer, corrosion-resistant finish - ABSTRACT OF THE DISCLOSURE The present invention is directed to a high protection coating process that is particularly useful for substrates in need of corrosion protection. The invention provides methods of applying a non-chrome passivating layer or conversion coating to a substrate and optionally, a secondary conversion or passivating layer to the non-chrome passivating layer or conversion coating, and articles having said coatings thereon. | 02-05-2009 |
| 20160108513 | COATING SYSTEM FOR INTERNALLY-COOLED COMPONENT AND PROCESS THEREFOR - A method of coating includes applying a metallic coating slurry without a filler to a component; draining the metallic coating slurry; drying the metallic coating slurry to drive off the organic binder; and heat treating the component. | 04-21-2016 |
| 148265000 | Post chromium treatment with specified material (other than mere air drying) | 1 |
| 20090014094 | Methods for Reducing Hexavalent Chromium in Trivalent Chromate Conversion Coatings - The present invention is directed to trivalent chromate conversion coatings for plated metals, and more particularly, to methods for reducing hexavalent chromium in trivalent chromate conversion coatings. In one embodiment, such method includes placing a metal article having a trivalent chromate conversion coating in a reducing solution. The trivalent chromate conversion coating includes hexavalent chromium and the reducing solution including a reducing agent, which reduces the hexavalent chromium so as to reduce or eliminate the hexavalent chromium on the plated metal article. | 01-15-2009 |
| 148267000 | Contains trivalent chromium ion or reducing agent or an organic additive | 9 |
| 20080210341 | TREATMENT SOLUTION FOR FORMING BLACK HEXAVALENT CHROMIUM-FREE CHEMICAL CONVERSION COATING FILM ON ZINC OR ZINC ALLOY - Disclosed is a treatment solution for use in the formation of a black trivalent chromium chemical conversion coating film with uniformly stabilized black wash, luster and corrosive resistance irrespective of the type of the acidic, neutral or alkaline zinc plating bath employed or the presence or absence of nickel eutectoid. Also disclosed is a method of forming the black trivalent chromium chemical conversion coating film. The treatment solution comprises a trivalent chromium ion, a chelating agent capable of forming a water-soluble complex with the trivalent chromium, at least one metal ion selected from the group consisting of a cobalt ion, a nickel ion and an iron ion, and formic acid or a salt thereof as a buffer for hydrogen ion concentration. The treatment solution can be used for forming a black hexavalent chromium-free chemical conversion coating film on zinc or a zinc alloy. | 09-04-2008 |
| 20090032146 | Aqueous Reaction Solution and Method of Passivating Workpieces Having Zinc or Zinc Alloy Surfaces and Use of a Heteroaromatic Compound - For producing corrosion resistant yellow passivate layers on zinc and zinc alloy surfaces, an aqueous reaction solution is utilized that contains trivalent chromium ions, at least one acid as well as at least one heteroaromatic compound selected from the group comprising nicotinic acid, the salts and derivatives thereof. | 02-05-2009 |
| 20090242081 | Aluminum Treatment Composition - An aqueous conversion coating composition for treating metal substrates such as aluminum, aluminum alloys, zinc, zinc alloys, magnesium, magnesium alloys and steel to provide a conversion coating thereon. The conversion coating composition comprises a) a source of aluminum ions; b) a fluoro compound; c) at least one pH adjuster; d) a source of Group VIB metal ions selected from the group consisting of tungstate ions and trivalent chromium ions; and e) optionally, a preservative. The conversion coating composition provides a corrosion resistant coating on the metal surface and improves the adhesion of subsequently applied layers. | 10-01-2009 |
| 20110100513 | TRIVALENT CHROMIUM PASSIVATION AND PRETREATMENT COMPOSITION AND METHOD FOR ZINC-CONTAINING METALS - Aqueous compositions useful as pretreatments prior to painting and to prevent the formation of white rust in the uncoated condition include an organopolyphosphonic acid or salt thereof, an organosilane, and a trivalent chromium compound. A method for treating a surface of a zinc-containing metal includes contacting the surface with an aqueous composition including an organopolyphosphonic acid or salt thereof, an organosilane, and a trivalent chromium compound. The composition may also include an agent for reducing hydrophilicity, such as a polyacrylic acid. The aqueous composition has been found to be particularly well-suited for treating a zinc-containing metal to passivate the surface, improve paint adhesion, and/or improve corrosion resistance. | 05-05-2011 |
| 20110132498 | Composition for Chemical Conversion Treatment and Member Having a Chemical Conversion Film Formed by the Treatment - A chemical conversion treatment solution comprising, based on the total composition, 0.1 g/L to 3.0 g/L of an aqueous cobalt-containing substance in cobalt equivalent, 0.05 g/L to 3.0 g/L of a pyrogallol compound in pyrogallol equivalent, and at least 1.5 g/L of an aqueous trivalent chromium-containing substance in chromium equivalent, the composition being acidic and the ratio of the content of the pyrogallol compound in pyrogallol equivalent to the content of the aqueous cobalt-containing substance in cobalt equivalent being 0.015 to 10, wherein a chemical conversion film formed on the metallic surface of a member by contacting the metallic surface with the composition for chemical conversion treatment has a content of hexavalent chromium of 0.050 μg/cm | 06-09-2011 |
| 20110168299 | PROCESS FOR PRODUCING AN AQUEOUS SOLUTION CONTAINING A SOURCE OF CHROMIUM (III) - In a method for manufacturing an aqueous solution containing a source of chromium (III) according to the present invention, an aqueous solution containing trivalent chromium is added to an aqueous solution of an inorganic alkali under the condition of a reaction liquid temperature of 0° C. or more and less than 50° C., so that the amount of the trivalent chromium is not locally excessive with respect to the amount of the alkali, to produce chromium hydroxide, and then the chromium hydroxide is dissolved in an aqueous solution of an acid to obtain an aqueous solution containing a source of chromium (III). Preferably, after production of the chromium hydroxide, filtration is performed, and the chromium hydroxide is washed with water until the conductivity of the filtrate is 5 mS/cm or less. | 07-14-2011 |
| 20140130941 | AQUEOUS ACIDIC COMPOSITION FOR FORMING CHROMIUM-CONTAINING CHEMICAL CONVERSION COATING ON IRON-BASED MEMBER, AND IRON-BASED MEMBER HAVING CHEMICAL CONVERSION COATING FORMED USING THE COMPOSITION - An aqueous acidic composition is provided for forming a chromium-containing chemical conversion coating on a member having an iron-based metal surface. The composition contains a water-soluble trivalent chromium-containing substance, a water-soluble zinc-containing substance, and a water-soluble polyvalent carboxylic acid compound. On the total composition basis, the water-soluble trivalent chromium-containing substance has a content of 60 mmol/L or more in terms of chromium, the water-soluble zinc-containing substance has a molar content in terms of zinc such that a ratio of the content is 0.6 or more to a molar content in terms of chromium of the water-soluble trivalent chromium-containing substance, and the water-soluble polyvalent carboxylic acid compound has a content of 55 mmol/L or more in terms of polyvalent carboxylic acid. The composition is free from allylamine, polyallylamine, aromatic sulphonic acid, aromatic sulphonic acid-formaldehyde condensate, and derivatives thereof, and fluorine-based substance, hexavalent chromium-containing substance, and film-forming organic component. | 05-15-2014 |
| 20150020925 | METHOD FOR THE SURFACE TREATMENT OF PARTS MADE OF AN ALUMINUM OR MAGNESIUM ALLOY - A method for surface treatment of a part made of aluminum, magnesium, or one of the alloys thereof, to protect the part from corrosion. The method comprises consecutively immersing the part in a first aqueous bath containing a corrosion-inhibiting metal salt and an oxidizing compound, and a second aqueous bath containing an oxidizing compound and a corrosion-inhibiting rare-earth salt. The method can be carried out for the chemical conversion of aluminum or the alloys thereof, and of magnesium or the alloys thereof, on parts that have not been previously treated, or after anodizing the part to seal the anodic layer. | 01-22-2015 |
| 20150322575 | TRIVALENT CHROMIUM PASSIVATION AND PRETREATMENT COMPOSITION AND METHOD FOR ZINC-CONTAINING METALS - Aqueous compositions useful as pretreatments prior to painting and to prevent the formation of white rust in the uncoated condition include an organopolyphosphonic acid or salt thereof, an organosilane, and a trivalent chromium compound. A method for treating a surface of a zinc-containing metal includes contacting the surface with an aqueous composition including an organopolyphosphonic acid or salt thereof, an organosilane, and a trivalent chromium compound. The composition may also include an agent for reducing hydrophilicity, such as a polyacrylic acid. The aqueous composition has been found to be particularly well-suited for treating a zinc-containing metal to passivate the surface, improve paint adhesion, and/or improve corrosion resistance. | 11-12-2015 |
| 148268000 | Contains an atom or boron, silicon or metal atom other than alkali metal | 1 |
| 20080245445 | PROCESS FOR FORMING A CHROMIUM DIFFUSION PORTION AND ARTICLES MADE THEREFROM - In one embodiment, a method for forming an article with a diffusion portion comprises: forming a slurry comprising chromium and silicon, applying the slurry to the article, and heating the article to a sufficient temperature and for a sufficient period of time to diffuse chromium and silicon into the article and form a diffusion portion comprising silicon and a microstructure comprising α-chromium. In one embodiment, a gas turbine component comprises: a superalloy and a diffusion portion having a depth of less than or equal to 60 μm measured from the superalloy surface into the gas turbine component. The diffusion portion has a diffusion surface having a microstructure comprising greater than or equal to 40% by volume α-chromium. | 10-09-2008 |
