Constant-current intermittent cathodic protection and corrosion acceleration system and implementation method thereof

Abstract

The invention relates to a constant-current rate intermittent cathodic protection and corrosion acceleration system and an implementation method thereof in the field of impressed current cathodic protection technologies and the experimental investigation thereof. The constant-current rate intermittent cathodic protection and corrosion acceleration system performs multiway constant-current output intermittent cathodic protection and corrosion acceleration functions, and a corrosion acceleration system and a cathodic protection system are provided with a common PWM (pulse-width modulation) constant-current control module and PWM single-ended converter. The constant-current rate intermittent cathodic protection and corrosion acceleration system conducts cathodic protection in a constant-current intermittent manner, so the cathodic protection cost is reduced; and meanwhile, the constant-current rate intermittent cathodic protection and corrosion acceleration system also performs a function of conducting corrosion acceleration at a constant-current rate, so the corrosion states of steel bars can be accurately predicted; the constant-current adjustable characteristic of the constant-current rate intermittent cathodic protection and corrosion acceleration system satisfies technological requirements of RC (reinforced concrete) structures with different numbers of steel bars and a impressed current cathodic protection and a common system module is used for providing the two functions, so the cost is saved.

Description

technical field [0001] The patent of the present invention relates to the field of impressed current cathodic protection technology and its experimental research, specifically a constant current intermittent cathodic protection and accelerated corrosion system and its realization method. Background technique [0002] With the increasing saturation of traffic construction in my country in recent decades, more and more old bridges, old docks and old building structures have been corroded and damaged due to unfavorable environments, and urgently need to be repaired, strengthened and anti-corrosion. At present, in order to study the corrosion damage mechanism of reinforced concrete structures, the accelerated corrosion test of applied current is often used, that is, a direct current is applied between the steel bar (used as an anode) and the auxiliary cathode (such as titanium mesh or copper mesh, etc.), so that Cl -1 Such harmful media quickly accumulate on the surface of the a...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the existing accelerated corrosion test power supply system that cannot perform accelerated corrosion at a constant rate and simultaneously meet the needs of multi-channel reinforced concrete structure specimens for accelerated corrosion tests and cathodic protection, and disclose a constant current intermittent cathode Protection and Acceleration Corrosion System and Implementation Method

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