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Composite corrosion and scale inhibitor for open type cooling water system made of galvanized pipe, preparation method and application thereof

A corrosion and scale inhibitor, cooling water technology, applied in the direction of descaling and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as a blank, achieve good compatibility, high concentration Multiples, the effect of low product cost

Active Publication Date: 2010-04-28
SHANGHAI YIKE GREEN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be said that the current patents for scale and corrosion inhibitors for open cooling water systems made of galvanized pipes are almost blank

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Prepare 100kg of cooling water composite corrosion and scale inhibitors, the preparation process: add 1.88Kg of zinc chloride to the container, add 1kg of phosphonobutane tricarboxylic acid, 8kg of polyacrylic acid, 5kg of carboxylate-sulfonic acid Salt-nonionic terpolymer, 7kg tolyltriazole, 12kg of polyol phosphonate, and 65.12kg of water were mixed uniformly to obtain light yellow liquid.

[0030] For scale inhibition of the open cooling water system made of galvanized pipes, the indicators of the cooling water are as follows:

[0031] Concentration ratio C≥4, total alkalinity ≥500mg / l calculated as calcium carbonate, total hardness ≥600mg / l calculated as calcium carbonate, pH≥8.6.

[0032] Add in the amount of 100mg / l cooling water, refer to the "Cooling Water Analysis and Test Method" of China Petroleum and Chemical Corporation and the "Water Quality and Water Treatment Agent Product Quality Inspection Manual" of the Ministry of Chemical Industry for scale and corr...

Embodiment 2

[0035] Prepare 100kg of cooling water composite corrosion and scale inhibitors. The preparation process: add 1.67kg of zinc chloride to the container, add 20kg of hydroxyphosphoroacetic acid, 4kg of hydrolyzed polymaleic anhydride, and 4kg of acrylic acid-acrylic acid ester- Phosphonic acid-AMPS tetrapolymer, 6kg tolyltriazole, 10kg polyol phosphonate, and 54.33kg water were mixed uniformly to obtain light yellow liquid.

[0036] For scale inhibition of the open cooling water system made of galvanized pipes, the indicators of the cooling water are as follows:

[0037] Concentration ratio C≥4, total alkalinity ≥500mg / l calculated as calcium carbonate, total hardness ≥600mg / l calculated as calcium carbonate, pH≥8.6.

[0038] Add in the amount of 100mg / l cooling water, refer to the "Cooling Water Analysis and Test Method" of China Petroleum and Chemical Corporation and the "Water Quality and Water Treatment Agent Product Quality Inspection Manual" of the Ministry of Chemical Indu...

Embodiment 3

[0041] Prepare 100kg of cooling water composite corrosion and scale inhibitors, the preparation process: add 3.20kg of zinc nitrate hexahydrate to the container, add 18kg of phosphonocarboxylic acid, 1kg of polyacrylic acid, 3kg of acrylic acid-2-acrylamide- 2-Methylpropanesulfonic acid polypolymer, 5kg tolutriazole, 9kg polyol phosphonate, and 60.8kg water were mixed uniformly to obtain light yellow liquid.

[0042] For the scale inhibition of the open cooling water system made of galvanized pipes, the indicators of the cooling water are as follows:

[0043] Concentration ratio C≥4, total alkalinity≥500mg / l calculated as calcium carbonate, total hardness≥600mg / l calculated as calcium carbonate, pH≥8.6.

[0044] Add in the amount of 100mg / l cooling water, refer to the "Cooling Water Analysis and Test Method" of China Petroleum and Chemical Corporation and the "Water Quality and Water Treatment Agent Product Quality Inspection Manual" of the Ministry of Chemical Industry for sc...

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Abstract

The invention discloses a composite corrosion and scale inhibitor for an open type cooling water system made of a galvanized pipe, a preparation method and application thereof. The composite corrosion and scale inhibitor for the cooling system comprises the following components in percentage by weight: 1 to 20 percent of organophosphorus carboxylic acid, 1 to 30 percent of polycarboxylic acid, 1 to 10 percent of organic multicopolymer, 1 to 10 percent of methylbenzotriazole, 1 to 15 percent of polyhdric alcohol phosphate ester, 0.1 to 1 percent of zinc element in a zinc source, and the balance of water. The composite corrosion and scale inhibitor is suitable for the corrosion and scale inhibition treatment on the open type cooling water system made of the galvanized pipe, has good corrosion inhibition effect on a galvanized layer of the inner wall of the pipe of the cooling water system, and still has good scale-inhibiting effect when satisfying high concentration factor, high alkalinity, high hardness and high pH value at the same time.

Description

technical field [0001] The invention relates to a chemical engineering water treatment agent, in particular to a corrosion and scale inhibitor for circulating cooling water, in particular to a composite corrosion and scale inhibitor for an open cooling water system made of galvanized pipe material, and a preparation method and application thereof. Background technique [0002] At present, a common open circulating cooling water piping system is made of galvanized pipes, which are divided into two types: hot-dip galvanized pipes and cold-dip galvanized pipes. Hot-dip galvanizing is to pickle the steel pipe first, in order to remove the iron oxide on the surface of the steel pipe, then wash it in an ammonium chloride or zinc chloride aqueous solution or a mixed aqueous solution of ammonium chloride and zinc chloride, and then send it to hot-dip galvanizing. in the zinc bath. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. Col...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14
Inventor 宋力王海平余志荣
Owner SHANGHAI YIKE GREEN ENG
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