4results about How to "Crystal dense" patented technology

The application relates to a method for preparing a platinum layer on the surface of a niobium or titanium material matrix by electrodeposition in room-temperature ionic liquid, and belongs to the technical field of surface treatment. The method solves the technical problem of insufficient performance of the platinum layer prepared on the surface of the niobium or titanium material matrix by electrodeposition, and comprises the following steps: S1, preparing room-temperature ionic liquid; S2, pretreating the matrix; S3, acid washing and activating; S4, cleaning and soaking; S5, electrodeposition; and S6, post-treatment. The steps S3-S6 are all carried out in a protective atmosphere. The electrodeposition process temperature is at or near room temperature; the electrochemical window is wide; through optimization of the combination of the anion and cation ionic liquid, the ionic solution has adjustable physicochemical properties, thereby the oxidation-reduction potential and deposition morphology of platinum are regulated. The ionic liquid electrodeposition keeps the activated surface layer of the matrix clean, eliminates the hydrogen evolution reaction, realizes electrodeposition to obtain a platinum layer under room-temperature conditions, and the platinum layer has good interface bonding force, no porosity and dense crystallization.

The invention discloses a hot galvanizing method for an extra-high voltage transmission tower steel part, which belongs to the field of hot galvanizing and comprises the steps of hanging materials, pickling with hydrochloric acid to remove rust, cleaning with water, assisting in plating with a solvent, drying, purifying zinc liquid, hot-dip galvanizing and cooling, the zinc liquid purification step comprises slag removal pretreatment, zinc liquid temperature regulation and control, purification agent preparation, purification agent caging and liquid feeding, moving reaction for iron removal and scum removal, and the purification agent comprises industrial-grade metal aluminum wires and water-containing gas substances. The purifying agent is prepared from industrial-grade metal aluminum wires and water-containing gas production substances, wrapped by high-temperature-resistant glass wool cloth into a cluster, loaded into a cage frame made of titanium alloy round steel bars and reciprocatingly moved in the length direction of a zinc pot, so that iron-containing impurities in molten zinc fully react with the purifying agent in the cage frame, and a gray vermicular flocculent reaction product is generated; and then the dross is fished out, so that the purification of iron impurities in the zinc liquid is realized, the liquidity of the zinc liquid is improved, and the adhesive force of a zinc coating on a steel substrate is improved.

The present application relates to the technical field of silver plating of castings, and particularly relates to a silver plating equipment and method for castings, which comprises a rack, a feeding displacement mechanism, a silver plating mechanism and a clamping mechanism, the rack is provided with a feeding channel, the feeding displacement mechanism is fixedly connected with the rack and has a displacement portal capable of moving along the direction of the feeding channel, the silver plating mechanism is fixedly connected with the rack and has a plurality of silver plating units, the clamping mechanism is fixedly connected with the displacement portal and has a clamping sliding frame capable of moving vertically, and a plurality of clamping units are fixed on the clamping sliding frame along the length direction of the clamping sliding frame. The independent silver plating units are arranged, the plating solution is forced to flow directionally in the relatively narrow silver plating cavity, the exchange capacity of the plating solution to the area of the columnar body of the casting is effectively enhanced, the power line distribution is optimized by cooperating with the accurate release end arrangement, the silver ions can be effectively transmitted and deposited on the surface of the casting, and thus the silver plating layer with uniform thickness and dense crystallization is obtained.

The application discloses an early-strength heat-insulation type light plastering gypsum mortar and a preparation method thereof. The early-strength heat-insulation type light plastering gypsum mortar comprises the following raw materials in parts by weight: 550-800 parts of gypsum powder, 100-300 parts of heavy calcium, 100-300 parts of light aggregate, 50-100 parts of inorganic retarder, 1-5 parts of early-strength water reducing agent, 1-5 parts of reinforcing agent, 1-4 parts of cellulose ether, 5-15 parts of redispersible latex powder and 400-450 parts of water. The early-strength water reducing agent is prepared by reacting high-purity gypsum and polycarboxylic acid water reducing agent solution, and high-activity functional groups in the polycarboxylic acid water reducing agent are inlaid on the surface of fibrous calcium sulfate whiskers. The light aggregate is prepared from autoclaved aerated concrete. The inorganic expanding agent is used to adjust the setting time, the early-strength water reducing agent and the reinforcing agent are used to improve the compressive strength and bonding strength of the gypsum mortar, and the autoclaved aerated concrete is used to replace traditional light aggregates such as vitrified small balls and expanded vermiculite, so that the heat preservation performance of the gypsum mortar is improved.