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1,2,4-triazolo[1,5-a]pyrimidine derivative as copper corrosion inhibitor

A technology of corrosion inhibitor and anti-corrosion agent, applied in the field of corrosion inhibitor and corrosion inhibition, can solve problems such as reducing the effectiveness of corrosion inhibitor

Pending Publication Date: 2021-12-31
ECOLAB USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The protective film provided by various azoles corrodes in the presence of oxidizing halogens such as chlorine, hypochlorite and hypobromite, reducing the effectiveness of the corrosion inhibitor

Method used

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  • 1,2,4-triazolo[1,5-a]pyrimidine derivative as copper corrosion inhibitor
  • 1,2,4-triazolo[1,5-a]pyrimidine derivative as copper corrosion inhibitor
  • 1,2,4-triazolo[1,5-a]pyrimidine derivative as copper corrosion inhibitor

Examples

Experimental program
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Embodiment 1

[0102] Example 1: Corrosion performance of pyrimidine derivatives.

[0103] Perform various electrochemical experiments. The pH of the test water was maintained at approximately 7 using carbon dioxide in each experiment. The water temperature was maintained at about 45°C throughout the experiment. Copper coupon samples were dipped into a 1 liter electrochemical cell containing a corrosion inhibitor (approximately 5 ppm active) and Rp (polarization resistance) was recorded over a period of 48 hours. From about 24 hours to about 48 hours, a few microliters of bleach are added to achieve a free residual chlorine (FRC) level of about 0.5 to about 1.2 ppm. Analysis was performed using the following test conditions: initial E: about -0.02V; final E: about +0.02V; scan rate: about 0.5mV / s; sample period: about 1 second; repetition time: about 15 minutes; sample area: about 5cm 2 : Density: about 8.89g / cm3 .

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Abstract

The present disclosure relates to corrosion inhibitor compositions, formulations, and compounds. The compositions, formulations, and compounds may be used is various methods to inhibit corrosion of metallic surfaces in aqueous environments. The corrosion inhibitor compositions may include one of the following compounds or any combination of any of the compounds of formula (I) in the specification.

Description

technical field [0001] The present disclosure generally relates to corrosion inhibitors and methods of inhibiting corrosion. More particularly, the present disclosure relates to 1,2,4-triazolo[1,5-a]pyrimidine derivatives as corrosion inhibitors and methods of inhibiting corrosion of metal surfaces in aqueous environments. Background technique [0002] Copper and copper alloy components are commonly used in industrial systems due to copper's high thermal conductivity and antimicrobial properties. Copper and copper alloys (eg, bronze and brass) are relatively corrosion resistant due to the protective film layers that naturally coat the copper surface, including an inner cuprous oxide film layer and an outer cupric oxide film layer. Under anaerobic conditions, these protective layers generally reduce the rate of further corrosion of the metal surface. However, copper and copper alloys are susceptible to corrosion under certain conditions. In the presence of oxygen and under...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D487/04C09D5/08C23F11/14
CPCC07D487/04C23F11/149C09D5/08C23F11/10C02F5/12C02F2303/08C02F1/72C02F2303/04C02F2303/22C02F2103/023
Inventor A·哈本杜
Owner ECOLAB USA INC