Corrosion inhibitor performance evaluation device and method of circular cooling water system

Abstract

The invention discloses a corrosion inhibitor performance evaluation device and method of a circular cooling water system and belongs to the technical field of corrosion inhibitor performance evaluation. In the invention, a circulating water pump is connected with a circular cooling water tank through a pipeline, a heating bar is arranged in the circular cooling water tank, the water inlet of a flow meter is connected with the circulating water pump through a pipeline, the water outlet of the flow meter is connected with the water inlet of a five-opening glass tube through a pipeline, a working electrode, a reference electrode and an auxiliary electrode are respectively arranged on a working electrode opening, a reference electrode opening and an auxiliary electrode opening, the water outlet of the five-opening glass tube is connected with the circular cooling water tank through a pipeline, and the working electrode, the reference electrode and the auxiliary electrode are connected with an electrochemical working station. The device provided by the invention can simulate the flow speed and temperature condition of the circular cooling water under actual working condition, perform AC impedance spectroscopy test on the testing system at the operation state of a testing device, and calculate according to the electrochemical total reaction charge transfer resistance under corrosion inhibitor / non-corrosion inhibitor condition to obtain the corrosion inhibition efficiency of the corrosion inhibitor.

Description

technical field [0001] The invention relates to the technical field of corrosion inhibitor performance evaluation, in particular to a corrosion inhibitor performance evaluation device and method for circulating cooling water systems. Background technique [0002] Corrosion is a major problem in circulating cooling water systems. While the recycling of cooling water can save water resources, it also aggravates the corrosion problem of the circulating cooling water system. Adding corrosion inhibitors to circulating cooling water systems is an effective way to solve corrosion problems. There are many kinds of corrosion inhibitors on the market, and the development and application of green and environment-friendly corrosion inhibitors have also received extensive attention. However, how to evaluate the corrosion inhibition performance of corrosion inhibitors accurately, effectively and quickly is very critical for the development and selection of corrosion inhibitors. [0003...

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Problems solved by technology

[0010] The purpose of the present invention is to overcome the electrochemical method in the existing corrosion inhibitor performance test method can not better simulate the operating conditions of circulating cooling water, and the rotating coupon method can more accurately reflect the corrosion inhibition performance of the corrosion inhibitor, but Time-consuming and labor-intensive and not suitable for operation, a corrosion inhibitor performance evaluation device and method for circulating cooling water systems are provided. According to the characteristics of circulating cooling water systems, the present invention designs five glass tubes for simulating circulating cooling water The hydraulic conditions and the fixed three electrodes have successfully realized the organic combination of the electrochemical AC impedance test method and the dynamic test conditions of the circulating cooling water. The development and design can not only simulate the temperature and flow rate conditions of the circulating cooling water system, but also quickly evaluate the corrosion inhibitor. A dynamic test device for corrosion inhibition performance, and a test method based on the developed device

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