Corrosion Inhibitor Injection via Radiolytic pH Shift
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Solution Overview
Problem
Current methods for injecting anticorrosive agents in nuclear power plants require significant time, leading to prolonged periodic inspections and reduced power generation efficiency, as they slow down the construction process.
Innovation Solution
A method involving the injection of an anticorrosive agent-pH adjusting agent complex into high temperature water, where the complex is irradiated with radioactive or ultraviolet rays, accelerating the deposition of the anticorrosive agent onto metal structural materials by altering the pH of the water, thereby enhancing the corrosion inhibition process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional anticorrosive agent injection methods are used, then corrosion protection is achieved, but construction time increases and power generation efficiency decreases
Solution Approach 1:
The invention changes the chemical parameters of the injection solution by incorporating a pH adjusting agent that reacts with radiolytic oxidants (hydrogen peroxide, oxygen) to neutralize them. This parameter change (pH adjustment and oxidant neutralization) creates a more favorable chemical environment for rapid anticorrosive agent deposition, reducing construction time while maintaining corrosion protection effectiveness
Solution Approach 2:
The invention introduces a pH adjusting agent as an intermediary substance that mediates between the radiolytic oxidants in the reactor water and the anticorrosive agent. This intermediary neutralizes the oxidants and adjusts pH, creating optimal conditions for the anticorrosive agent to deposit rapidly on metal surfaces without being hindered by oxidative degradation or unfavorable pH conditions
2Reliability
If conventional anticorrosive agent injection methods are used, then corrosion protection is achieved, but periodic inspection duration increases
Solution Approach 1:
The invention performs preliminary action by pre-adjusting the pH and neutralizing oxidants in the injection solution before the anticorrosive agent is deposited onto the metal surfaces. This preliminary chemical preparation ensures that the anticorrosive agent adheres rapidly and forms a stable protective layer, reducing the time required for periodic re-inspection and re-application
3Reliability
If conventional anticorrosive agent injection methods are used, then corrosion inhibition is achieved, but power generation efficiency decreases
Solution Approach 1:
The invention substitutes chemical mechanisms for prolonged mechanical/time-based processes. By using radiolytic oxidant neutralization and pH adjustment to create rapid deposition conditions, the system achieves corrosion protection through chemical acceleration rather than extended injection periods, thereby maintaining power generation efficiency while ensuring corrosion inhibition
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method significantly increases the deposition rate of the anticorrosive agent onto metal structural materials, reducing construction time and maintaining power generation efficiency by efficiently inhibiting corrosion.
Implementation Method 1
the pH adjusting agent present on the surface of the anticorrosive agent of the anticorrosive agent-pH adjusting agent complex and/or in the high temperature water is oxidized with the oxidant by the irradiation with a radioactive ray or an ultraviolet ray
Implementation Method 2
deposition of the anticorrosive agent to the metal structural material is accelerated
Data Source
AI summary
A method for injecting a corrosion inhibitor injecting an oxidant and an anticorrosive agent-pH adjusting agent complex including an anticorrosive agent and a pH adjusting agent adsorbed on a surface of the anticorrosive agent into high temperature water in contact with a surface of a metal structural material and irradiating the high temperature water with a radioactive ray or an ultraviolet ray, wherein the anticorrosive agent of the anticorrosive agent-pH adjusting agent complex has, on the surface of the anticorrosive agent, an active site where the pH adjusting agent reacts with the oxidant, and the pH adjusting agent present on the surface of the anticorrosive agent of the anticorrosive agent-pH adjusting agent complex and/or in the high temperature water is oxidized with the oxidant by the irradiation with the radioactive ray or the ultraviolet ray to change pH adjusting ability of the pH adjusting agent and shift a pH of the high temperature water to a neutral side, and thereby deposition of the anticorrosive agent 11 to the metal structural material 65 is accelerated.