38results about How to "Strong acid corrosion resistance" patented technology

The invention discloses high-strength and corrosion-resisting glassware and a preparation method thereof. The high-strength and corrosion-resisting glassware is prepared from the following raw materials in parts by weight: 80 to 85 parts of quartz sand, 2 to 5 parts of calcium oxide, 0.1 to 0.5 part of iron oxide, 0.3 to 0.5 part of titanium dioxide, 0.1 to 0.3 part of bismuth trioxide, 0.1 to 0.4part of magnesium oxide, 0.1 to 0.3 part of aluminum oxide, 2 to 4 parts of kaolin, 0.1 to 0.3 part of vanadium dioxide, 5 to 10 parts of sodium carbonate, 0.1 to 0.3 part of niobium dioxide, 0.1 to0.2 part of tellurium dioxide and 0.1 to 0.2 part of silver chloride. The preparation method comprises the following four steps: mixing the materials, smelting, molding, and inducing to nucleate. Theglassware prepared by the invention has the advantages of high mechanical strength and strong corrosion resistance and is suitable for being produced and applied in a large scale.

The invention discloses a polyfluortetraethylene sandwich layer protective ion exchange membrane. The polyfluortetraethylene sandwich layer protective ion exchange membrane comprises a sulfonation polymer ion exchange membrane basic membrane, and also comprises a polyfluortetraethylene microporous membrane(s) which is / are used as a sandwich layer protective membrane and attached to one side or two sides of the basic membrane. The invention also discloses a preparation method of the polyfluortetraethylene sandwich layer protective ion exchange membrane and a liquid flow battery adopting the polyfluortetraethylene sandwich layer protective ion exchange membrane. By adopting the polyfluortetraethylene sandwich layer protective ion exchange membrane, the high ion selectivity and high stability requirements can be simultaneously met, the efficiency of the liquid flow battery is improved, the cycling life is prolonged and especially the all-vanadium redox flow battery can be remarkably improved.

The invention relates to the fire resistance material technical field, in particular to a half silica brick of 7.63m for coke oven, which solves the problem of unstable volume, weak rusty resistance, easy expansion and easy shrink in high temperature for long time of the prior the half silica brick which is produced by adopting pyrauxite material. The raw material formulation comprises crude bauxite cribble powder which is ranged from 8 percent to 12 percent, crude bauxite medium powder which is ranged from 44 percent to 48 percent, fire resistance clay fine powder which is ranged from 22 percent to 26 percent, silex medium powder which is ranged from 18 percent to 22 percent, potassium feldspar which is ranged from 1.9 percent to 2.1 percent and pulp which is ranged from 0.45 percent to 0.55 percent. The crude bauxite cribble powder, crude bauxite medium powder, fire resistance clay fine powder and silex medium powder are mixed into a wet roller pro rata, then potassium feldspar is mixed into and pulp is mixed after grinded for 1 to 2 minutes to get mud material after grinded from 15 to 20 minutes. The mud material is mixed to uniform and even, then gets out of the roller into a mold. The invention has the advantages of more superior rationalize index of half silica brick than the national standard, stable volume, strength acidity erosion resistance, unshrinkable function in high temperature1350 DEG C for long time, higher weight soften temperature. The invention completely coincides the demands for brick of coke oven and dry quenching coke oven.

The invention discloses a special fire-resistant and acid-resistant brick, which is represented by weight percentage. The raw material of the fire-resistant and acid-resistant brick contains 20-50% of mullite, 5-20% of corundum, 35-20% of a-Al2O, and 2% of bonded clay. ~12%, silica powder 5~20%, talcum powder 3~10% and SiO2 fine powder 2~6%. The materials are configured according to the proportioning ratio, then mixed and milled with a binder, trapped, dried, finally fired, and cooled naturally to obtain the special refractory and acid-resistant brick of the present invention. The product of the present invention uses mullite, corundum and clay as the main raw materials, and introduces some additives, so that the prepared product has high bulk density, low porosity, high compressive strength, strong wear resistance, and acid erosion resistance. Strong and other characteristics, and the high temperature index load softening temperature and refractoriness of the product of the present invention are far superior to conventional acid-resistant bricks, and can be widely used in acid regeneration roasters, petroleum, chemical industry, metallurgy, electric power, chemical fiber, papermaking, pharmaceuticals, chemical fertilizers, food And other anti-corrosion works.

This invention relates to a method for preparing acid-resistant anode. The acid-resistant anode is composed of Ti as the matrix, SnO2 + Sb2O4 + graphite fibers as the intermediate buffer layer, and PbO2 or MnO2 as the active layer. The method adds highly conductive and acid-resistant graphite fibers into the intermediate buffer layer, thus the adhesiveness between the active layer and the intermediate buffer layer is improved, and the anode has high conductivity and service life in strong acid solution. The acid-resistant anode has such advantages as high acid resistance, long service life, high catalytic activity and wide applications.

The invention relates to a preparing method for a corrosion prevention organic silicon binding agent for a desulfurization chimney liner of a thermal power plant. The preparing method comprises the following steps that firstly, a first component is prepared, wherein hydroxyl-terminated polydimethylsiloxane, polyethylene glycol PEG 600, a defoaming agent, a coupling agent and a solvent a are added into a reaction kettle according to a certain proportion and stirred evenly, then inorganic filler is added multiple times with a small amount, vacuum stirring is carried out for 60 minutes under the condition of the vacuum degree of 0.08 MPa, and the first component of the binding agent is obtained; secondly, a second component is prepared, wherein the curing agent polyisocyanate, a catalyst and a solvent b are added into a reaction kettle according to a certain proportion and stirred evenly, and the second component of the binding agent is obtained; thirdly, the first component and the second component are blended at the mass ration of 20:1 at the room temperature and stirred evenly, and the organic silicon binding agent is obtained. The organic silicon binding agent prepared through the method is high in binding performance, excellent in strong acid and strong base corrosion resistance, and good in high-temperature aging resistance and high-low temperature alternating resistance.

The invention discloses a machining method of corrosion-resistant metal shelf, and belongs to the technical field of metal machining. The metal shelf is formed by machining through material blending and powder making, pressing forming, sintering and surface treatment. The metal shelf comprises raw materials of 4-6 % of Tl, 0.2-0.6 % of Be, 0.6-0.8 % of C, 0.6-1 % of Os, 1-3 % of Pb, 2-4 % of Sn, 0.4-0.8 % of Ir and the balance Fe and impurities; and the impurities comprise less than 0.055 % of S and less than 0.015 % of O. In the process of powder metallurgy, all organizational structures of metal are refined continuously by powder making through a mechanical method, atomic-level mixing is achieved finally, and alloying is realized; and a uniform and compact protective film is formed by combining a surface phosphating process.

The invention discloses an acid-resistant, tough, high-wear cast ball and a preparation method thereof. The preparation method comprises the following steps: S1, smelting in a smelting furnace to obtain molten iron; S2, adding aluminum ingots to the molten iron before being released from the furnace Carry out deoxidation, then transfer the molten iron to the transfer ladle, pour the slag into the pouring ladle for pouring, and obtain the cast slab after cooling; S3, raise the temperature of the cast slab to 500-510°C for 2-3h, and then raise the temperature to 780‑790°C for 2‑3h, then heated to 940‑950°C for 2‑3h, then raised to 1015‑1030°C for 2‑3h, quenched with quenching oil for 10‑15min, and finally kept at 260‑280°C for 6‑ 8h for tempering treatment, that is. The casting ball prepared by the invention not only has excellent acid and corrosion resistance, but also has high hardness and good wear resistance, which is beneficial to improving economic benefits.

The invention discloses a method for preparing a silvery white chemical conversion coating on a brass surface. The method is characterized in that the brass surface reacts with a conversion solution to generate colored ions deposited on the surface, thereby forming the silvery white chemical conversion coating. The method comprises the following steps: carrying out deoiling, polishing, activation and cleaning on the brass matrix, putting into an antimony-salt-containing acidic solution, reacting with the solution until a uniform-stable-color silvery white coating is generated on the brass surface, and carrying out related subsequent treatment to prevent the coating surface from being contaminated. The method has the advantages of simple technical process and low cost. The prepared coating has the advantages of high acid corrosion resistance and favorable binding force, and can simultaneously perform the functions of decoration and corrosion resistance.