Stainless steel passivating liquid
A passivation solution, stainless steel technology, applied in the direction of metal material coating process, etc., can solve the problems of poor film formation and poor corrosion resistance, and achieve the purpose of improving compatibility, corrosion resistance, and surface activity. Effect
Active Publication Date: 2018-11-13
宁波辉格金属制品有限公司
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to provide a stainless steel passivation solution for the poor film-forming properties and poor corrosion resistance of the commonly used stainless steel passivation solution at present.
Method used
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Experimental program
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preparation example Construction
[0027] The preparation method of modified sulfonated graphene comprises the steps:
[0028] (1) Take flake graphite and grind it through a 400-mesh sieve, collect the sieved particles and add salt material at a mass ratio of 1:3~5 to make a ball mill, and add ethanol with a volume fraction of 50% at a material-to-liquid ratio of 1:2~5 The solutions were mixed, and wet ball milled at 300~500r / min for 3~5h to obtain the ball milled product. The ball milled product was washed with water at a mass ratio of 1:3~5, and then moved to an oven at 80~90°C for drying to obtain pretreated graphene. Mix p-aminobenzenesulfonic acid, NaOH, and water in a container at 25~30°C with a mass ratio of 2:1:15~20, move to an ice-water bath, stir magnetically at 300~400r / min for 25~40min, add p-aminobenzenesulfonic acid 30~50% NaNO by mass of benzenesulfonic acid 2 1. Hydrochloric acid solution with a concentration of 0.1mol / L of 20-35% p-aminobenzenesulfonic acid mass, mixed and stirred, and left t...
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The invention relates to stainless steel passivating liquid and belongs to the technical field of metal surface treatment. According to the stainless steel passivating liquid, graphite serving as theraw material and salt serving as the ball-milling material are mixed and ball-milled, mechanical exfoliation is performed, matched with a diazonium salt solution, -PH-SO3H is added into a mixture, andaccordingly, modified sulfonated graphene is prepared; the surface activity of the modified sulfonated graphene is improved, palygorskite serves as the raw material to perform modification, boric acid can be chemically adsorbed to the surface of the palygorskite, then magnesium stearate is used for treatment, the compatibility of the palygorskite with a base material and the dispersity of the palygorskite in the base material are improved, the modified graphene is used in a matched mode so as to promote hydroxyl silicate in the modified palygorskite to fast form self-healing film with low shearing strength, the corrosion resistance of stainless steel is improved, rice washing water and polyvinylpyrrolidone reinforce film forming, the interfacial compatibility effect is improved, the ricewashing water is matched with the acid component in a passivating agent system for derusting, a flat film forming surface is provided for passivating and film forming effect, and the stable and uniform film is formed. By means of the stainless steel passivating liquid, the problem that current ordinary stainless steel passivating liquid is poor in film forming property and corrosion resistance issolved.
Description
technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a stainless steel passivation solution. Background technique [0002] After stainless steel products are processed, most products need to be pickled and passivated to ensure the corrosion resistance of stainless steel products. [0003] Stainless steel has good corrosion resistance, high temperature oxidation resistance, good low temperature resistance and excellent mechanical and processability, so it is widely used in chemical industry, petroleum, power, nuclear engineering, aerospace, ocean, medicine, light industry, textile and other fields. Corrosion resistance is the most important feature of stainless steel. In addition to the difference in material itself, its performance mainly depends on the quality of the passivation film formed on the surface of stainless steel. If the film is incomplete or defective, stainless steel will still be corroded. Stainless ...
Claims
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IPC IPC(8): C23C22/50
CPCC23C22/50
Inventor 胡丽春陈建春卢星
Owner 宁波辉格金属制品有限公司