46results about How to "Excellent resistance to blackening" patented technology

An agent for treating metal surfaces which comprises an aqueous medium and, incorporated therein, (A) a cationic urethane resin which is water-soluble or in an aqueous emulsion form, (B) a cationic polycondensation product obtained from a phenol compound and an aldehyde, and (C) a zirconium compound and/or titanium compound. A coating film formed from the treating agent imparts excellent corrosion resistance and alkali resistance to a metallic material. When the proportion of the urethane resin (A) is equal to or higher than that of the polycondensation product (B), yellowing resistance can be also imparted. By incorporating a metal compound (D) containing a specific metal, excellent blacking resistance also can be imparted. Furthermore, by incorporating an acid ingredient (E) and a vanadium compound (F), a further improvement in performances can be attained.

The present invention provides a surface treatment composition and a surface treatment method capable of forming a film having excellent corrosion resistance, fingerprint resistance, blackening resistance, paint adhesion, etc. on the surface of a metal material. It contains an aqueous medium and the following components: (A) metal ions selected from Mn ions, Co ions, Zn ions, Mg ions, Ni ions, Ti ions, V ions and Zr ions, (B) having at least 4 fluorine atoms and elements selected from Ti, Zr, Si, Hf, Al and B, (C) has active hydrogen-containing amino, epoxy, vinyl, mercapto and methacryloxy Silane coupling agent with selected reactive functional groups, and (D) aqueous emulsification using resin selected from cationic or nonionic polyurethane resin, acrylic resin, epoxy resin, polyester resin and polyamide resin as the resin component Resin composition for surface treatment of metal materials and method for surface treatment of metal materials using the same.

To provide a composition for surface treatment of a non-chromium metallic material capable of depositing a film having excellent corrosion resistance, black discoloration resistance and coating adhesivity on the surface of the metallic material, and to provide a surface treatment method using the composition. In the composition for surface treatment of the metallic material, (A) at least one kind of phosphoric compound to be selected from a group consisting of phosphoric acid, condensed phosphoric acid, organic phosphonic acid, and ammonium salt thereof, (B) fluoro acid having at least one element selected from a group consisting of at least four fluorine atoms, titanium, zirconium, silicon, hafnium, aluminum and boron, and (C) silane coupling agent (C1) having at least one active hydrogen containing amino radical, and silane coupling agent (C2) having at least one epoxy radical are dissolved in aqueous medium or blended in a dispersive state, and the ratio of the solid of the component (A) to the total solids of the components (A)-(C) is 0.1-80 mass%. The composition is used for the surface treatment method of the metallic material.

The invention discloses a manufacturing method for hot dipped steel plates excellent in blackening resistance and corrosion resistance. The manufacturing method comprises the following steps: increasing the oxygen partial pressure in an annealing furnace to 30-80 ppm when basic strip steel enters a preheating section of the annealing furnace, wherein the dew point of the preheating furnace is 0-50DEG C, the furnace pressure of the annealing furnace is 300-500 Pa, and the preheating temperature is 500-700 DEG C; controlling the dew point of a soaking section at 30 DEG C below zero to 30 DEG Cafter the basic strip steel enters the soaking section, wherein the hydrogen content in percent by volume is 15-25%; and finally, controlling the cooling speed at 20-100 DEG C/s for cooling, wherein the basic strip steel enters a zinc pot to produce Mg-containing hot dipped steel plates. Mg-enriched ternary eutectic phase sheets in coatings of the steel plates are small in interlayer spacing, relatively short and uniform in distribution, Mg-containing oxides are unlikely produced, and the hot dipped steel plates have high corrosion resistance and good blacken resistance. In a severe environment, the corrosion resistance of the coatings is 2-3 times of that of conventional hot dipped steel plates, or the corrosion resistance is even higher, and the quality of the surface tissues of the coatings is good.

The invention discloses a chromium-free passivation solution for the surface of a hot-dip zinc-aluminum-magnesium steel plate and a preparation method of a hot-dip zinc-aluminum-magnesium chromium-free passivation plate, and belongs to the technical field of hot-hip zinc-aluminum-magnesium steel plates. The passivation solution is prepared from, by weight, 5-15 parts of silicate, 10-50 parts of strong oxidizing acid group ion containing compound, 5-30 parts of organic acid salt, 150-450 parts of waterborne polyurethane emulsion and 0.1-10 parts of a defoaming agent. The coating of the hot-dipzinc-aluminum-magnesium steel plate is prepared from, by weight, 1%-5% of Al, 0.2%-3% of Mg, 0%-0.3% Si and the balance Zn. After the passivation solution is used for hot-dip zinc-aluminum-magnesium steel plates, the steel plate has excellent environmental protection performance, coating property, corrosion resistance, blackness resistance, fingerprint resistance and water resistance.

The invention discloses a thickened hot-dipping aluminum-zinc-plated steel plate and a preparation method of the thickened hot-dipping aluminum-zinc-plated steel plate and belongs to the technical field of coating steel plates. The thickened hot-dipping aluminum-zinc-plated steel plate comprises a substrate, wherein the surface of the outward side of the substrate in a used state is combined with a first plating-assistant layer, and the surface of the inward side of the substrate in the used state is combined with a second plating-assistant layer; the surface of the first plating-assistant layer is combined with a first structure layer; the surface of the second plating-assistant layer is combined with a second structure layer. Therefore, the thickness of a plated layer on the outward side of the substrate in the used state and the thickness of a plated layer on the inward side of the substrate in the used state are increased, and the sum of the thicknesses of the plated layers on the two sides is up to 270g/m<2>, so that the stability of the plated layers can be guaranteed, the good attachment effect between the plated layers and the substrate is achieved, the corrosion resistance performance, the processed shaping performance and the blackening resistance performance can be obviously improved, and the defects of falling off, cracking and the like of the plated layers during use can be avoided; the technical steps are simple and short; the technical requirement is low; the conventional aluminum-zinc-plated steel plate production line can be used for continuous and high-efficiency production.

The invention discloses a zinc-aluminum-magnesium plating layer surface treating agent as well as a preparation method and a use method thereof, and belongs to the technical field of zinc-aluminum-magnesium alloy plating layer steel plate surface treatment. In order to meet the requirements of household appliances and automobile users on blackening resistance and environmental friendliness of hot-dip galvanized aluminum-magnesium alloy coated steel plates, the invention provides a zinc-aluminum-magnesium plating layer surface treating agent which comprises 1-5 parts of fluoride, 3-10 parts ofperiodate, 0.5-5 parts of weakly alkaline medium, 20-50 parts of water-based organic resin, 5-15 parts of colloidal silicon dioxide and 100 parts of water. Fluoride and periodate react with Mg on thesurface of a plating layer under the weak alkaline condition to generate a compact film layer, water-based organic resin adheres to the surface of the plating layer, gaps are filled with colloidal silicon dioxide, contact between the plating layer and water vapor and oxygen in the environment is effectively hindered, and the corrosion resistance, blackening resistance, water resistance and fingerprint resistance of the surface coating are remarkably improved.

The invention provides a zinc-magnesium-aluminum coated steel plate with excellent blackening resistance and adhesive performance and a preparation method of the zinc-magnesium-aluminum coated steel plate. A zinc coating comprises the following components in percentage by mass: 0.1-6.0% of Al, 0.1-4.0% of Mg and the balance of Zn and inevitable impurities. A chemical conversion layer comprises zinc salt of organic carboxylic acid with 6 or less carbon atoms; and compared with the prior art, the zinc-magnesium-aluminum coated steel plate provided by the invention has excellent blackening resistance and adhesive performance.

This hot-dip Zn-alloy-plated steel sheet comprises: a steel sheet; and a hot-dip Zn-alloy-plated layer arranged on a surface of the steel sheet. The entire surface of the hot-dip Zn-alloy-plated layer satisfies the following formula (1): S[Zn(OH)2]/(S[Zn(OH)2]+S[Zn]) * 100 <= 40. In formula (1): S[Zn] is the area exhibited by a peak having a center at approximately 1022 eV ascribable to metallic Zn in an intensity profile in XPS analysis of the surface of the hot-dip Zn-alloy-plated layer; and S[Zn(OH)2] is the area exhibited by a peak having a center at approximately 1023 eV ascribable to Zn(OH)2 in an intensity profile in XPS analysis of the surface of the hot-dip Zn-alloy-plated layer.

Disclosed is a phosphate-treated galvanized steel sheet wherein a zinc plating layer is formed on a steel sheet surface, a phosphate treatment layer is formed on the zinc plating layer, and an Ni adhesion portion is interposed between the zinc plating layer and the phosphate treatment layer in an amount of 0.1-500 mg/m<2>. This phosphate-treated galvanized steel sheet is excellent in corrosion resistance and blackening resistance. The phosphate treatment layer may preferably contain not less than 0.1% by mass but less than 2.0% by mass of Mg.

The invention discloses a surface treating agent for a medium-aluminum zinc-aluminum-magnesium coated steel plate and a manufacturing method thereof. The surface treating agent for the medium-aluminumzinc-aluminum-magnesium coated steel plate comprises the following components in parts by weight of 30-45 parts of waterborne polyurethane resin, 1.5-3.0 parts of a coupling agent of organic titanate, 0.5-1.5 parts of a silane coupling agent, 0.2-0.3 part of magnesium oxide, 0.8-1.2 parts of a water-based hindered phenol antioxidant, 0.6-0.9 part of water-based epoxy ether polymer, 1.0-2.0 partsof water-based oxidized polyethlene wax and 50-65 parts of deionized water.

A chemically converted steel sheet having a chemically converted coating film is made by coating a Zn-based plated steel sheet with a chemical conversion treatment solution and drying the same. The chemically converted coating film is constituted by a first chemically converted layer including V, Mo, and P, and a second chemically converted layer provided on said layer and including a group 4A metal oxygen acid salt, and the ratio of pentavalent V to all the Vs in the chemically converted coating film is 0.7 or greater. The chemical conversion treatment solution includes specific proportions of V, Mo, an amine, the group 4A metal oxygen acid salt, and P, and substantially does not include hydrophilic resins, fluorine, or silicon.

The invention relates to a hot-dip galvanized aluminum-magnesium alloy coated steel plate and a preparation method. The hot-dip galvanized aluminum-magnesium alloy coated steel plate prepared by the method not only has excellent corrosion resistance, blackening resistance and notch protectiveness, but also has good surface quality and mechanical properties, and can completely meet application in the fields of household appliances, machinery, agriculture, animal husbandry and the like.

The invention belongs to the technical field of electroplating processing, and particularly relates to an environment friendly chromate-free passivation solution based on silicate, and a passivation technology thereof. The environment friendly chromate-free passivation solution based on the silicate provided by the invention comprises water, low mass molecule alcohol, sodium silicate, potassium silicate, sodium metasilicate, silane hydrolysate, diphenol propane, diethylene glycol monobutyl ether, sorbitol, phytic acid, glacial acetic acid, tannin, boric acid, sodium metasulfite, sodium nitrate, sodium hydrogen sulfite and other components, has excellent stability and can be stably stored for more than three months; and in the aspect of a passivation performance, a passivated coating has excellent corrosion resistance, blackening resistance and high temperature baking resistance. A passivation technology of the environment friendly chromate-free passivation solution based on the silicate provided by the invention comprises the steps of steeping, airing, ageing and the like. The environment friendly chromate-free passivation solution based on the silicate and the passivation technology thereof are simple and convenient to operate, economical in cost and stable and reliable in quality, and have higher popularization and application values.

The invention belongs to the technical field of surface treatment, and discloses a chromium-free aluminum coating agent and a preparation method thereof. Based on the total weight of the non-chromium aluminum coating agent, the non-chromium aluminum coating agent comprises the following components in percentage by weight: 20-40% of phytic acid, 1-20% of a surfactant, 1-20% of sodium tripolyphosphate, 1-20% of a metal ion chelating agent, 1-20% of a silicon-aluminum compound and 10-40% of water. The non-chromium aluminum coating agent does not contain phosphorus, is environment-friendly, is convenient to use, and is beneficial to reducing the cost.