38results about How to "Inhibits galvanic corrosion" patented technology

The purpose of the present invention is to provide a copper etching liquid which is capable of reliably suppressing galvanic corrosion, while achieving easy bath control and excellent etching rate. Inorder to achieve the above-described purpose, the present invention provides a copper etching liquid which is composed of an alkaline aqueous solution, and which is characterized by containing 1-70 g / L of copper, 10-500 g / L of ammonia water in terms of 25% ammonia water and 5-500g / L of an ammonium salt. This copper etching liquid is also characterized in that the ammonium salt is composed of oneor more ammonium salts that are selected from the group consisting of an ammonium salt of an inorganic acid, an ammonium salt of a sulfonic acid, an ammonium salt of a saturated fatty acid, an ammonium salt of an aromatic carboxylic acid, an ammonium salt of a hydroxy acid and an ammonium salt of a dicarboxylic acid.

The invention discloses an interface circuit and an electronic device. The interface circuit comprises an interface and an identifying circuit; the interface comprises a first detecting pin; the identifying circuit comprises a detecting end; the detecting end is connected with the first detecting pin; the identifying circuit inputs detecting signals to the first detecting pin through the detectingend; and the detecting signals are used for inhibiting electrochemical corrosion of the first detecting pin and electric conducting liquid when the first detecting pin is contacted with the electricconducting liquid. The electrochemical corrosion of the interface is inhibited when the electric conducting liquid enters the first detecting pin of the interface.

The invention discloses polyaniline graphene nano composite anticorrosion paint and a preparation method thereof. The polyaniline graphene nano composite anticorrosion paint is prepared by uniformly stirring a component A and a component B in a weight ratio of 1: 0.25 to 1: 0.5; the component A comprises 40 to 60 parts by weight of epoxy resin, 1 to 5 parts by weight of flatting agent, 1 to 5 parts by weight of defoaming agent, 10 to 20 parts by weight of filler, 1 to 5 parts by weight of wetting dispersing agent and 20 to 40 parts by weight of first solvent; the component B comprises 30 to 50 parts of curing agent, 10 to 30 parts of eigenstate polyaniline graphene composite material and 30 to 50 parts of second solvent. The eigenstate polyaniline and metal form a passivation film, the dispersion of a single layer or fewer layers of graphene is guaranteed on the aspect of the molecular level, the formation of a graphene conducting network is prevented, and the electrochemical corrosion is inhibited; meanwhile, a physical shielding and chemical anticorrosion effect is provided, so that the paint is excellent in anticorrosion performance, resistant to high temperature and high in hardness; and moreover, the preparation method is simple, controllable, low in production cost and suitable for industrialized production.

The invention discloses a waterborne epoxy anticorrosive coating containing a composite active salt and a preparation method of the coating. The coating comprises a component A and a component B, andthe mass ratio of the component A to the component B is (3-5):1. The component A comprises: 35-40 parts of a waterborne epoxy emulsion, 1-2 parts of carbon black, 10-15 parts of mica powder, 10-15 parts of precipitated barium sulfate, 10-20 parts of a composite active salt phosphite / metaaluminate, 1-2 parts of a wetting and dispersing agent, 0.3-0.5 part of an antifoaming agent, 0.3-0.5 part of aleveling agent, 2-3 parts of a thixotropic agent, and 20-30 parts of deionized water. The component B comprises: 7-10 parts of a waterborne epoxy curing agent, 3-5 parts of a co-solvent, 10-15 parts of deionized water, and 1-3 parts of an amino group-containing organosilicon monomer. The phosphite / metaluminate composite active filler is selected as an anticorrosive filler, a cured film is formed by combining with a resin, and a coating layer formed by the prepared waterborne epoxy composition coating has excellent corrosion resistance to salt spray, cathode peeling, seawater immersion and deionized water immersion, and has excellent adhesion.

The invention discloses a drainage method aiming at a buried metal pipeline near a direct-current grounding electrode, and relates to the field of corrosion prevention of buried metal pipelines, especially the field of corrosion prevention of the buried metal pipelines in a direct-current stray current environment. The drainage method comprises the following steps that the strength and direction of stray current borne by the metal pipeline near the direct-current grounding electrode are tested; the resistance rate of a soil medium where the metal pipeline near the direct-current grounding electrode is located is tested; drained current protection parameters are calculated; and field installation and parameter monitoring are carried out. The drainage efficiency can be improved, the engineering cost and the corrosion risks can be reduced, the anti-corrosion effect of the buried metal pipeline is guaranteed, and the service life of the buried metal pipeline is prolonged.

The invention discloses a method for solving the obstruction of a hollow lead of a generator stator bar and inhibiting the corrosion of the hollow lead. The method comprises the following steps: pickling for descaling, activating, and prefilming, wherein a composite acid used in the pickling step comprises, by weight, 65-92 parts of aminosulfonic acid and 8-35 parts of hydrofluoric acid, and a prefilming agent used in the prefilming step comprises, by weight, 35-45 parts of tolyltriazole, 40-44 parts of 2-mercaptobenzothiazole, 10-25 parts of benzotriazole and 10-15 parts of hydroxypropyl methyl cellulose. The method can realize the thorough solving of copper corrosion deposits adhered in the hollow lead and the formation of a firm molecular film in the hollow lead without corroding other metal materials in the cooling water system of the generator stator, effectively prevents the direct contact of copper atoms with cooling water, and substantially inhibits the electrochemical corrosion of copper in the cooling water with a low pH value.

The invention provides a set of seawater desalination and reclamation conditioning devices. A seawater desalination water inlet pipeline is connected to a water inlet of a carbon dioxide absorbing tower; a water outlet of the carbon dioxide absorbing tower is connected to a water inlet of a seawater desalination water tank; one end of a main pipeline is connected to a water outlet of the seawater desalination water tank while the other end of the main pipeline is connected to a water inlet of a lime milk pipeline mixer; a seawater desalination water pump and a first online PH meter which is interlocked with a carbon dioxide gas regulating valve are arranged on the main pipeline; an outlet pipeline of the lime milk pipeline mixer is connected to a conditioning water tank, and a second online PH meter which is interlocked with a lime milk adding metering pump is arranged on a connecting pipeline. The whole set of system equipment is controlled by virtue of a PLC (Programmable Logic Controller) or a DCS (Distributed Control System), and is used for supplementing a certain quantity of mineralized materials into desalinated seawater in an accurate adding manner so as to guarantee residents in good health and simultaneously protecting the safe running of water supply networks.

The invention relates to a constant-current rate intermittent cathodic protection and corrosion acceleration system and an implementation method thereof in the field of impressed current cathodic protection technologies and the experimental investigation thereof. The constant-current rate intermittent cathodic protection and corrosion acceleration system performs multiway constant-current output intermittent cathodic protection and corrosion acceleration functions, and a corrosion acceleration system and a cathodic protection system are provided with a common PWM (pulse-width modulation) constant-current control module and PWM single-ended converter. The constant-current rate intermittent cathodic protection and corrosion acceleration system conducts cathodic protection in a constant-current intermittent manner, so the cathodic protection cost is reduced; and meanwhile, the constant-current rate intermittent cathodic protection and corrosion acceleration system also performs a function of conducting corrosion acceleration at a constant-current rate, so the corrosion states of steel bars can be accurately predicted; the constant-current adjustable characteristic of the constant-current rate intermittent cathodic protection and corrosion acceleration system satisfies technological requirements of RC (reinforced concrete) structures with different numbers of steel bars and a impressed current cathodic protection and a common system module is used for providing the two functions, so the cost is saved.

The invention relates to the technical field of new material processing, and discloses a method for improving the corrosion resistance of magnesium alloy valves. The prepared corrosion-resistant coating material is co-electrodeposited with zinc ions to the magnesium alloy valves to be plated by metal electrodeposition. On the workpiece, a dense layer with a thickness of 10.0-12.0 microns is formed to obtain a composite coating, which acts as an inert anti-corrosion barrier, prevents corrosion, remains stable in acidic media, can withstand the test of general high temperature, and reduces stress corrosion. Sensitivity, can inhibit the occurrence of electrochemical corrosion, the invention can significantly improve the corrosion resistance of magnesium alloy valves, solve the problems of high porosity and unstable protective properties of corrosion-resistant coatings for existing magnesium alloy valves, and have no pollution The waste liquid is produced without toxicity, and the economic and social benefits are significantly improved.

A method of protecting a transparent nonmetallic electroconductive part formed by, e.g., ITO, on a transparent substrate, e.g., a glass substrate, from electrochemical corrosion, is characterized by coating the transparent nonmetallic electroconductive part with a room-temperature-curable silicone rubber composition that contains from 1 weight-ppm to 30 weight% of a triazole compound, e.g., a 1,2,4-triazole compound or a benzotriazole compound; and thereafter curing the composition.

The invention discloses a manufacturing process of an anti-electrochemical-corrosion pipe pile. The manufacturing process comprises the following steps that step 1, 420-480 kg / m<3> of cement, 200-230kg / m<3> of ground sand, 1700-1800 kg / m<3> of crushed stone, 70-120kg / m<3> of ground blast furnace slag, 90-110kg / m<3> of water, 4-6kg / m<3> of a water reducing agent, 0.5-1.5kg / m<3> of ultrafine aluminum powder with an average particle size of 7-15[mu]m and 0.3-0.6kg / m<3> of conductive fiber are made to fresh mixed concrete by a concrete forced mixer; step 2, insulating coating is applied on the inner surface of a centrifugal steel mold, and a prepared steel skeleton is placed in the centrifugal steel mold and connected with a prestressed steel anchor plate, a tension plate and a tension rod; and step 3, the lower half mold is filled with the fresh mixed concrete prepared in the step 2 is uniformly filled along the centrifugal steel mold, and the concrete is distributed more at the end which is preset to be subjected to tension. The pipe pile can internally form an anti-electrochemistry-corrosion structure and an ionic environment, and the anti-corrosion capacity of the pipe pile can beeffectively improved.

The invention relates to an anti-corrosion and anti-corrosion paint, in particular to a surface anti-corrosion treatment agent for cable bridges. It solves the problem that the traditional dacromet anti-corrosion coating in the prior art is difficult to meet the anti-corrosion problem of the cable tray. The present invention increases the proportion of scaly zinc powder on the basis of the traditional dacromet paint formula, increases penetrants, surfactants, hardening agents, and rare earth materials, and overcomes the poor anti-scratch effect of traditional dacromet paints Problems, so that the surface of the cable tray has a strong ability to resist scratches. Especially for cable trays, the coating formed on the surface of the present invention has high adhesion, high wear resistance, high weather resistance and high chemical resistance stability, and is very suitable for long-term use in harsh field environments. It can maintain the anti-rust effect for at least 30 years.

A gold bronze alloy with high discoloration resistance and low cost and a preparation method thereof. The alloy includes the following components Mn, Al, Ni, Si, Ce, Sr, P, B, and the balance is Cu and unavoidable impurities. The preparation process includes: smelting, semi-continuous casting; hot rolling; face milling, cold rolling, intermediate annealing; cold finish rough rolling, cold finish rolling, and finished product annealing. The alloy produced by the invention has high golden degree, good discoloration resistance, excellent heat and cold processing performance, small deformation resistance, no precious metal elements, and low cost. The composition of the alloy in the invention is reasonable, and the gold degree of the alloy is improved through reasonable matching of cheap manganese, aluminum, nickel and silicon. The reasonable combination of strontium, cerium, phosphorus and silicon can improve the process performance and anti-tarnish performance. The raw material of the alloy is cheap, the production process is simple, the environment is friendly, the production cost is low, the processing performance is good, the gold degree is high, and the anti-discoloration performance is excellent in salt spray, high humidity, artificial sweat and other environments, and it is suitable for industrial production.

A gold brass alloy with high tarnish resistance and a preparation method thereof. The alloy includes the following components Mn, Sn, Ni, Zn, Sr, Ce, B, Si, the balance being Cu and unavoidable impurities. The preparation process includes: melting and casting; hot rolling; cold rolling, intermediate annealing; cold finish rough rolling, cold finish rolling, and finished annealing. The alloy produced by the invention has high golden degree, good discoloration resistance, excellent heat and cold processing performance, small deformation resistance, no precious metal elements, and low cost. The composition of the alloy in the present invention is reasonable, and the gold color of the alloy is improved through a reasonable combination of cheap manganese, nickel, zinc and tin. The zinc content is lower than 20%, which can avoid dezincification corrosion, and the reasonable combination of strontium, cerium, boron and silicon , can improve process performance and improve anti-tarnish performance. The alloy has simple production process, low production cost, good processing performance, high gold degree, excellent anti-discoloration performance in salt spray, high humidity, artificial sweat and other environments, and is suitable for industrial production.

A method for making a joint structure including embedding a portion of at least two layers of a third component into a first component and interleaving at least one layer of a second component with an unembedded portion of the at least two layers of the third component, wherein the third component inhibits galvanic corrosion between the first and second components, the first component has a first CTE, the second component has a second CTE that is different from the first CTE, the third component has a third CTE that is between the first CTA and the second CTE, and the third component comprises a mesh component.

The invention belongs to the field of metal anti-corrosion, and in particular relates to a high-viscosity anti-corrosion tape suitable for marine and atmospheric environments, a preparation method and application thereof. The anti-corrosion tape is a non-woven fabric impregnated with anti-corrosion paste at high temperature; the anti-corrosion paste is 28-30% of high-viscosity modified polymerized linseed oil by weight percentage, 2-3% of corrosion inhibitor, and 5-8% of insulating agent. %, flame retardant inorganic filler 59‑65%. The anti-corrosion tape obtained by the invention has excellent bonding performance, wetting performance and anti-corrosion performance, and is applied to high-humidity, high-salt marine atmospheric environment.