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A method of improving copper corrosion inhibition in alkaline medium

An alkaline medium and copper corrosion inhibition technology, which is applied in the field of metal anticorrosion, can solve the problems of unreported copper slow release effect, achieve safety and environmental protection corrosion inhibition effect, prevent copper corrosion, and save resources

Inactive Publication Date: 2017-03-15
HUAIHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The study on the sustained release of copper under alkaline conditions has not been reported so far

Method used

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  • A method of improving copper corrosion inhibition in alkaline medium
  • A method of improving copper corrosion inhibition in alkaline medium
  • A method of improving copper corrosion inhibition in alkaline medium

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0041] The following examples are further detailed descriptions of the present invention.

[0042] Electrochemical test: CHI660D electrochemical workstation is used, using the traditional three-electrode working system: Hg / HgO electrode is the reference electrode; the carbon rod electrode is the auxiliary electrode; the working electrode is the copper electrode.

[0043] Brass rods use 240 in turn # ~600 # Grind step by step with sandpaper, degrease with acetone, wash with deionized water, dry, seal the non-measurement part with epoxy resin glue, and use 800 # ~1000 # Grinding with sandpaper and metallographic sandpaper, then polishing with flannelette, cleaning with deionized water, drying, and immersing in 7mol·L -1 HNO 3 for 15s, then quickly wash twice with secondary water and absolute ethanol respectively, and immerse in the film-forming solution as soon as possible. 3 Electrochemical tests were performed by immersing in the medium for 30 minutes.

[0044] The exper...

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Abstract

The invention belongs to the technical field of metal anticorrosion. The invention discloses a method for improving the corrosion inhibition effect of copper in an alkaline medium. The method is as follows: firstly, metal copper is put into a corrosion inhibitor solution, and the , soaked for 0.5-3h, after the soaking is completed, the metal copper is put into a sodium bicarbonate solution with a mass percentage of 5%, and soaked for 10-60min. The corrosion inhibitor is Schiff base and / or 8- Hydroxyquinoline. The concentration of the corrosion inhibitor is 0.1‑5mmol·L‑1. The corrosion inhibitor is Schiff base and 8-hydroxyquinoline, and the weight ratio of Schiff base and 8-hydroxyquinoline is 0.1-10:1. The method for improving copper corrosion inhibition in alkaline medium of the present invention has the advantages of simplicity, safety, environmental protection and good corrosion inhibition effect, can prevent copper corrosion, and save resources has great economic significance.

Description

technical field [0001] The invention relates to the technical field of metal anticorrosion, in particular to a method for improving the corrosion inhibition effect of copper in an alkaline medium. Background technique [0002] As an important industrial material, brass has the advantages of excellent electrical conductivity, thermal conductivity and corrosion resistance. It can replace carbon steel in many fields and be used in heating or in the cooling system. However, copper will corrode due to the influence of environmental medium, the nature of the metal material itself and the stress state. Copper anticorrosion methods include surface covering protective layer, electrochemical protection, corrosion inhibitor corrosion inhibition, surface modification, the most important of which is the use of various corrosion inhibitors for corrosion inhibition. Various corrosion inhibitors for copper and copper alloys are mainly used in cooling water systems, seawater and salt liqui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/06C23F11/14
CPCC23F11/146C23F11/10
Inventor 欧阳跃军唐莉莉唐彦春
Owner HUAIHUA UNIV