Control method of forced current cathodic protection for storage tanks

Abstract

A storage tank forced current cathodic protection control method, the steps include: initial detection, equipment operation, data collection, data processing, standard comparison, target comparison, over-protection adjustment calculation, under-protection adjustment calculation, positive adjustment calculation, negative adjustment computation and output conditioning. In the storage tank forced current cathodic protection control method of the present application, the potential measured by the reference electrode when the potentiostat is powered off is the power-off potential, which eliminates the inability to set the polarized test piece or polarized probe. The problem of detection, and the output of the potentiostat is adjusted by using the power-off potential as the control basis, which can meet the requirements of the industry standard and accurately achieve the effect of cathodic protection.

Description

technical field [0001] The invention belongs to the technical field of cathodic protection and anticorrosion, and in particular relates to a control method for forced current cathodic protection of a storage tank. Background technique [0002] The outer side of the tank bottom plate is in direct contact with the asphalt sand, but when the outer edge plate of the tank bottom is tilted, a large gap will be formed between the edge plate and the base. Due to the undulating deformation of the tank bottom plate, a There are many channels and spaces, so that rainwater can enter the center of the tank bottom plate, and the entry of rainwater will cause oxygen concentration corrosion, resulting in corrosion of the tank bottom plate. In order to solve this problem, waterproof measures have been taken on the outer edge of the bottom plate of the storage tank, but it is still difficult to solve the problem of corrosion on the bottom plate of the tank. [0003] Cathodic protection is an...

AI Technical Summary

Problems solved by technology

However, in this operation mode, when there is stray current in the environment, the IR will change greatly, and the potentiostat cannot automatically identify the interference, and the output may be abnormal and the phenomenon of automatic shutdown may occur.

Moreover, the power-on potential is used as the control index, which is inconsistent with the power-off potential required in the industry standard, and the cathodic protection effect cannot be accurately achieved.

Images