41results about How to "Excellent corrosion inhibition performance" patented technology

The present invention relates to a phosphorus-free composite antiincrustation corrosion inhibitor. It includes polyaspartic acid and/or polyepoxysuccinic acid and at least one kind of scale inhibition and dispersion agent, in which the scale inbibition and dispersion agent is polymer containing carboxylic acid group, or it includes polyaspartic acid and/or polyepoxysuccinic acid, zinc salt, molybdate or tungstate and polymer containing carboxylic acid group. Said invention is applicable to treatment of circulating cooling water.

This invention relates to a sort of low-phosphor scale-corrosion inhibitor which includes PBTCA, (and/or HPAA), poly-aspartic acid and/or polyepoxysuccinic acid and carboxyl-containing polymer. This inhibitor can be used to treat recirculated cooling water in ways such as inhibiting the forming of CaCO3 scale, inhibiting corrosion and stabilizing Zn2+ in water. Its phosphor concentration in recirculated water is no more than 1mg/L, reducing the hazard of phosphor discharge to environment.

The invention provides a molybdate-phosphonate compound corrosion inhibitior and the method for preparing the same. Said corrosion inhibitior comprises of solidum molybdate 1-20 wt%, organic phosphine 1-40 wt%, oxidant 1-10 wt% and excipient 97wt%. The compound corrosion inhibitior is characterized by convenient operation and management and satable corrosion inhibition performance.

The invention discloses an imidazoline quaternary ammonium salt corrosion inhibitor which is prepared from the following preparation raw materials including a corrosion inhibitor main component raw material and an additive raw material; the corrosion inhibitor main component raw material is one of oleic acid, benzoic acid, fatty acid, lauric acid and natural eleostearic acid; and the additive rawmaterial includes diethylenetriamine, dimethyl sulfate or benzyl chloride, boric acid and xylene. The invention also discloses a preparation method of the imidazoline quaternary ammonium salt corrosion inhibitor and aims at solving the problem of poor corrosion inhibition performance of the existing corrosion inhibitor in an acid medium. The preparation method is simple, is liable to operate and can perform recovery utilization on a solvent. An imidazoline corrosion inhibitor has the advantages of low toxicity, high slow release efficiency and wide use range. Physical characterization and performance test results of the corrosion inhibitor show that oleic acid imidazoline quaternary ammonium salt has better slow release performance, and the slow release performance of the benzyl chloride is better than the slow release performance of the dimethyl sulfate after being quaternized. A polarization curve test shows that synthesized corrosion inhibitors are all cathodal depression type corrosion inhibitors.

The invention relates to a phosphorus-free composite scale-inhibiting corrosion-retarding agent and an application thereof. The phosphorus-free composite scale-inhibiting corrosion-retarding agent comprises a water-soluble borate and at least one scale-inhibiting dispersant, wherein the scale-inhibiting dispersant is a carboxylic-group-containing phosphorus-free polymer. The comprehensive property of the phosphorus-free composite scale-inhibiting corrosion-retarding agent is good. The agent has good CaCO3 scale inhibiting performance, good stabilizing performance upon Zn<2+> in water, and good corrosion retarding performance. The agent can be used in treating circulating cooling water. With the agent, harm of phosphorus discharging to the environment can be solved.

The invention provides a plant type composite efficient corrosion inhibitor. The plant type composite efficient corrosion inhibitor is prepared from the following raw materials in percentage by mass: 12 to 66.0 percent of plants, 5.0 to 16.0 percent of sodium molybdate, 1.5 to 12 percent of sodium gluconate, 3.5 to 25 percent of sodium tartrate, 0 to 23 percent of zinc sulfate and 4.0 to 23.0 percent of monopotassium phosphate. The corrosion inhibitor disclosed by the invention is high in corrosion inhibition capability and can achieve a corrosion inhibition effect on a chlorine salt type snow-melting agent. After the corrosion inhibitor is added, the corrosion of the chlorine salt type snow-melting agent to metal and concrete and the harm to vegetation can be reduced. The corrosion inhibitor is mainly prepared from plants, is non-toxic, and is a very efficient and environment-friendly corrosion inhibitor. The invention further provides a preparation method and application of the plant type composite efficient corrosion inhibitor.

The invention discloses an ecological water treatment chemical with both corrosion inhibition and scale inhibition performances. The ecological water treatment chemical comprises beta-dicarbonyl compound modified polyaspartic acid used as a main agent, and sodium molybdate, hydroxyethylidene diphosphonic acid and zinc salts used as auxiliary agents. The ecological water treatment chemical of the invention can be applied to a circulating cooling water treatment system, and has excellent corrosion and scale inhibition performances; the chemical has a calcium carbonate inhibition rate of 100% andan annual A3 carbon steel corrosion rate of less than 0.075 mm; the concentration of Zn<2+> in discharged water is 0-1.5 mg/L, and the content of phosphorus in the discharged water is 0-0.05 mg/L; soharm to the environment due to high contents of phosphorus and zinc is avoided, and increasingly strict environmental protection requirements are met.

The invention belongs to the technical field of metal material processing, particularly relates to a corrosion inhibitor suitable for dynamic strong alkaline cleaning of metal workpieces, and furtherdiscloses a preparation method of the corrosion inhibitor. The corrosion inhibitor suitable for dynamic strong alkaline cleaning of the metal workpieces is synthesized from raw materials of glycerin triglycidyl ether, 4,4-diaminodiphenylmethane tetraglycidyl amine, ethylenediamine, cystine, DMF, 4-imidazolylethylamine, aminethronii hydrobromidum, N,N-diphenylhydrazine and benzotriazole as raw materials. Through the synergistic effect between properties of all components, a corrosion inhibitor product is high in alkali resistance, can be further stirred in an alkaline environment for a long time without decomposition, can be directly used for the dynamic strong alkaline cleaning operation step of the metal workpieces such as brass, and has the more stable corrosion inhibition property and the higher corrosion inhibition effect.

The invention belongs to the field of fine organic chemical engineering, and in particular relates to a mixed fatty group di(benzimidazoline-ammonium-salt) as well as a preparation method and application thereof. The invention provides a structure of the mixed fatty group di(benzimidazoline-ammonium-salt), and further provides a preparation method and application of the mixed fatty group di(benzimidazoline-ammonium-salt). After a mixed fatty group and a quaternary ammonium group are introduced into benzimidazoline molecules, the hydrophobicity of a protection membrane can be improved, the metal corrosion velocity can be reduced, and the water solubility of a corrosion inhibitor can be improved. Results of experimental determination show that the corrosion inhibition effect of the corrosion inhibitor provided by the technical scheme of the invention is remarkably superior to that of a conventional corrosion inhibitor. The technical defects that in the prior art a corrosion inhibitor is poor in corrosion inhibition effect and poor in water solubility are solved. In addition, swill-cooked dirty oil is used as a raw material of the mixed fatty group di(benzimidazoline-ammonium-salt), so that the production cost is lowered, and furthermore the environment can be protected.