Abstract: Disclosed is a coating composition for DACROTIZED™ film comprising Cr-containing inorganic acid, Ni carbonate, reductant, surfactant and water which has excellent corrosion resistance, weather resistance and chemical resistance thus being widely applicable to anticorrosion treatments of metals such as various alloys, sintering metals, and the like.

Abstract: A water-based surface-treating agent for metallic materials which gives a film highly satisfactory in corrosion resistance, blackening resistance, wet secondary adhesion to topcoatings, low-pollution characteristics (amount of fixed chromium), chemical resistance (especially acid resistance and alkali resistance), etc., while retaining the intact practical liquid stability of conventional chromate-containing resinous coating agents.

Abstract: The present invention provides methods and compositions for the reduction of the corrosion rate of already corroding steel reinforcements embedded in a hardened concrete structure as well as for the protective corrosion inhibition of uncorroded steel reinforcements embedded in a hardened concrete structure exposed to aggressive environments. The inventive new compositions employed for the novel method are essentially based on one or more amino- and/or hydroxyalkylamino compound(s), which are partially or completely neutralized with one or more inorganic acid(s) and/or derivatives thereof and/or aliphatic carboxylic- and/or aromatic carboxylic acid(s), one or more surfactant(s) and one or more water-based or water-thinnable water repellent agent(s) selected from the group of organosilicones.

Abstract: The present invention provides metal surface treatment agents and metal surface treatment methods which can form a high anticorrosion coating without use of hexavalent chromium compounds which are a cause of environmental pollution. In the present invention, a metal surface is coated with a metal surface treatment agent made of a composition containing a compound containing at least one or more mercapto groups per molecule and, depending upon need, a curing agent, curing catalyst and/or silica and the coating of the metal surface treatment agent is heat-treated.

Abstract: Aqueous compositions are provided which are useful for forming temporary protective coatings on metallic substrates. The aqueous compositions may contain polyvinyl alcohol, surfactant and corrosion inhibitor. The protective coating may be easily removed once the substrate has been formed or otherwise shaped.

Abstract: In a chromating solution comprising a water-soluble chromium compound and a reducing agent and in which hexavalent chromium ions produced by dissolution of the water-soluble chromium compound have been partly reduced with the reducing agent to trivalent chromium ions, an oxycarboxylic acid compound is used as the reducing agent. This chromating solution causes neither gelation nor sedimentation of the solution even when hexavalent chromium ions are reduced to trivalent chromium ions at a reduction percentage of more than 50%. The chromating solution and a chromate film formed on a steel sheet may also contain an organic resin, phosphoric acid or a phosphoric acid compound, or a silica sol.

Abstract: This invention relates to a bivalent iron compound comprising a bivalent iron salt, an amino acid and a reducing material. It is known that bivalent iron salts exhibit specific effects in wide applications, for example, agricultural applications such as modification of soil quality, fishing applications such as quality preservation of fishes, medical applications such as treatment of diseases and industrial applications such as prevention of metal corrosion and purification of waste water and exhaust gas. However, the conventional bivalent iron salts suffer a problem that they cannot exhibit such effect for extended periods. This invention was successful in chemically stabilizing the bivalent iron salts by adding amino acids and reducing materials so as to sustain the effects inherent in the bivalent iron salts and to enable utilization thereof in industrial applications.

Abstract: The present invention relates to a process for making and a method for using a corrosion inhibitor composition to reduce the corrosion rate of a metal by a fluid containing a corrosion agent. The corrosion inhibitor composition comprises at least a quaternized compound having an amido moiety. An example of the quaternized compound is a quaternized amido imidazoline.

Abstract: A aqueous ink for a ball-point pen which is stable over time and has high pigment dispersion stability, includes a pigment, a water-soluble organic solvent, water, xanthane gum of about 0.01 to about 0.2 wt. % and a sodium alginate of about 0.2 to about 0.6 wt. % of a total amount of the ink.

Abstract: The invention relates to water-soluble polymeric thiosulfates, to a method for their preparation by polymer-analogous addition of tetrathionate to unsaturated polymers and to their application in surface coating.

Abstract: A surface treated metal sheet which is coated with a layer comprising, as main components, a complex and/or salt between a rare earth metal element and an organic compound having in the molecule one or more functional groups selected from among —O—, ═O, —OH, —COOH, —NH2, ═NH, ═N—, —SH, —SO3H and phosphoric groups, and a matrix which physically holds the above and has adhesive power for metal sheets, as well as a metal surface treatment solution used therefor.

Abstract: In a chromating solution comprising a water-soluble chromium compound and a reducing agent and in which hexavalent chromium ions produced by dissolution of the water-soluble chromium compound have been partly reduced with the reducing agent to trivalent chromium ions, an oxycarboxylic acid compound is used as the reducing agent. This chromating solution causes neither gelation nor sedimentation of the solution even when hexavalent chromium ions are reduced to trivalent chromium ions at a reduction percentage of more than 50%. The chromating solution and a chromate film formed on a steel sheet may also contain an organic resin, phosphoric acid or a phosphoric acid compound, or a silica sol.

Abstract: A concrete sealer material is provided containing a corrosion inhibitor which is free to migrate upon leeching from the concrete sealer. The inhibitor retards the rate of corrosion of reinforcements contained within the concrete, including metallic mesh, grid, rebar, and other metallic articles utilized for reinforcement. The sealer material is preferably a film forming component of silicate or silane modified siloxanes. The corrosion inhibitor is preferably an amine salt, an amino alcohol, alkalized salt of glucoheptonates, or, calcium nitrite and mixtures thereof. A compatibility enhancer of an aminoalkyl silane can be added to the blend.

Abstract: This invention is directed to a zwitterionic water-soluble imine of formula: wherein R1 is heterocyclyl, heteroaryl, aryl, arylalkyl, cycloalkyl or lower alkyl; R2 is alkyl, alkenyl, aminoalkyl, diaminoalkyl, hydroxyalkyl, alkoxyalkyl, thioalkyl, alkylthioalkyl or arylalkyl; R3 is hydrogen and lower alkyl, or R1 and R3 taken together form a cycloalkyl, p is 2, 3, 4 or 5; and Z is CO2−, OCO2−, SO3−, OSO3−, PO3− or OPO3− which are useful as ferrous metal corrosion inhibitors.