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Special cooling liquid for internal combustion locomotives

A technology for diesel locomotive and coolant, applied in the field of metal anti-corrosion, can solve problems such as system corrosion and poor scale inhibition effect, and achieve the effect of efficient corrosion inhibition and excellent corrosion inhibition effect

Pending Publication Date: 2022-01-14
常州市鑫光化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to replace imported products and solve the technical problems of poor system corrosion and scale inhibition effect caused by the use of silicate as a conventional corrosion inhibitor, the special coolant for diesel locomotives of the present invention is provided

Method used

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  • Special cooling liquid for internal combustion locomotives
  • Special cooling liquid for internal combustion locomotives
  • Special cooling liquid for internal combustion locomotives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In the locomotive cooling system, in addition to heat dissipation equipment, it is mainly composed of iron-based alloys, such as carbon steel, cast iron, stainless steel, etc. On the one hand, the corrosion of iron-based alloys will cause the aging of the locomotive cooling system itself. More importantly, the corrosion of iron-based alloys will seriously aggravate the corrosion of the H-85 brass material of the cooling equipment, which is the main cause of H-85 brass corrosion and perforation. one of the reasons. Therefore, for diesel locomotive coolant, the corrosion inhibition ability of corrosion inhibitors on subsidized alloys should be studied first.

[0024] Orthogonal experiment was carried out with corrosion inhibitor sodium nitrite, borax and benzotriazole as three factors. Orthogonal experiment design, calculated per liter of water, adding three levels of sodium nitrite 800mg / L, 1200mg / L, and 1800mg / L to the secondary reverse osmosis water, and adding three ...

Embodiment 2

[0040] In this embodiment, the special coolant for diesel locomotives is calculated by every liter of water. In the secondary reverse osmosis water, 1800 mg / L of sodium nitrite, 2000 mg / L of borax, 100 mg / L of BTA, 500 mg / L of sodium molybdate, n-heptanoic acid and 300 mg / L of aspartic acid (equal mass ratio) and 800 mg / L of benzimidazolamine compounds form a cooling liquid, and a sodium hydroxide solution is used to adjust the pH of the cooling liquid to 9.2.

[0041] Wherein the benzimidazolamine compound has the following formula ② structure:

[0042]

[0043] The preparation method of the cooling liquid: Dissolve sodium nitrite and borax in part of the secondary reverse osmosis water according to the formula quantity, add benzotriazole, stir and dissolve at a stirring speed of 1500rpm; then add sodium molybdate and keep stirring speed and stir to dissolve; then add n-heptanoic acid and aspartic acid, maintain the stirring speed and stir to dissolve; finally add the benz...

Embodiment 3

[0045] The internal-combustion locomotive special coolant of the present embodiment is calculated by every liter of water, and sodium nitrite 1800mg / L, borax 2000mg / L, BTA100mg / L, ammonium tungstate 400mg / L, sebacic acid and 600 mg / L of aspartic acid (equal mass ratio) and 600 mg / L of benzimidazolamine compounds form a cooling liquid, and a sodium hydroxide solution is used to adjust the pH of the cooling liquid to 9.6.

[0046] Wherein the benzimidazolamine compound has the following formula ③ structure:

[0047]

[0048] The preparation method of the cooling liquid: Dissolve sodium nitrite and borax in part of the secondary reverse osmosis water according to the formula quantity, add benzotriazole, stir and dissolve at a stirring speed of 1500rpm; then add ammonium tungstate, and maintain the stirring speed and stir to dissolve; then add sebacic acid and aspartic acid, maintain the stirring speed and stir to dissolve; finally add the benzimidazole amine compound of formul...

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Abstract

The invention relates to a special cooling liquid for internal combustion locomotives, which comprises the following formula components by weight on the basis of per liter of water: 1200-1800mg / L of sodium nitrite, 1000-2000mg / L of borax, 50-150mg / L of benzotriazole, 300-600mg / L of group VI metal-containing acid or salt thereof, 100-600mg / L of organic carboxylic acid or salt thereof containing more than 6 carbon atoms, and 500-1000g / L of a benzimidazole amine compound. The cooling liquid also comprises an alkaline pH regulator for regulating the pH value range of the cooling liquid to be 9.0-10.5. The cooling liquid disclosed by the invention has an efficient corrosion inhibition effect on various metals in a cooling water system of an internal combustion locomotive, can replace an imported NALCOOL 2000 corrosion inhibitor and has a better effect.

Description

technical field [0001] The invention relates to the technical field of metal anti-corrosion, in particular to a special coolant for diesel locomotives. Background technique [0002] Against the background of the great development of China's railway technology, the technology of diesel locomotives has also made considerable progress, successfully building a technical platform for 6,000-horsepower AC drive diesel locomotives represented by HXN3 and HXN5 locomotives. Harmony series diesel locomotive cooling water system is mainly composed of diesel engine water pump, cylinder head, cylinder liner, intercooler, locomotive cooling radiator, oil heat exchanger, fuel preheater and connecting pipelines. System components mainly include cast iron, carbon steel, copper, brass, cast aluminum, solder, etc. The main function of the cooling water system is to ensure that the main parts of the diesel engine work at a suitable temperature, to maintain a suitable fit gap between the moving ...

Claims

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Application Information

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IPC IPC(8): C09K5/20C23F11/06
CPCC09K5/20C23F11/06
Inventor 潘志勤高科伟嵇玉龙唐冯唐永明
Owner 常州市鑫光化工科技有限公司
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