Sacrificial anode structure and method for checking corrosion state of sacrificial anode structure

Abstract

The invention relates to a sacrificial anode structure. The sacrificial anode structure comprises a checking head, a plug screw and a corrosion block. Both the plug screw and the corrosion block are made of metal. The activity of the corrosion block is higher than that of the plug screw. A first hole and an indication channel are formed in the plug screw. A second hole is formed in the corrosion block. The plug screw and the corrosion block are fixedly connected. The first hole, the second hole and the indication channel are mutually communicated. The checking head is fixedly connected to the end of the plug screw. The sacrificial anode structure is simple, and the requirement for the manufacturing level is quite low; the corrosion state of a sacrificial anode can be known at regular times conveniently and rapidly, and timely monitoring and replacing are conducted; meanwhile, an insulation material is used between the plug screw and the corrosion block so that dissimilar metal contact corrosion between the plug screw and the corrosion block can be avoided, and the service life of the sacrificial anode is prolonged.

Description

technical field [0001] The invention relates to the technical field of anticorrosion of heat exchangers, in particular to a sacrificial anode structure and a method for inspecting its corrosion state. Background technique [0002] Existing heat exchangers usually use the method of setting sacrificial anodes to avoid corrosion of the metal liner, that is, connect a metal with a higher activity than it to the metal liner that needs to be protected, so as to avoid corrosion of the inner liner and pipeline by the electrolyte . According to the electrochemical principle, because the body potential of the anode material is relatively negative, it will provide cathodic current to the steel structure of the protected body through the electrolyte in the liquid, so that the protected steel structure will be cathodicized without rusting. With the continuous flow of current, the anode material itself is also continuously consumed while preventing the inner tank from rusting. When the ...

AI Technical Summary

Problems solved by technology

The corrosion rate between the corrosion block and the fixed support of the existing sacrificial anode is relatively fast, which affects the life of the sacrificial anode. It is not easy to quickly check the corrosion status of the sacrificial anode, and it is necessary to unscrew the assembly regularly for observation

At the same time, repeated disassembly and assembly will affect the life of the threaded interface

[0003] The patent with the publication number CN201678735U discloses a water heater anode rod that can detect and prompt that the anode material is exhausted. Output signal when the anode is exhausted, the cost is higher

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