Solid Product Layer Stabilization for Molten Salt Corrosion Resistance
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Solution Overview
Problem
Existing methods to improve corrosion resistance of solid materials in molten salts are complex and costly, requiring monitoring of oxygen and water levels, and are not very effective due to leaks and system inefficiencies.
Innovation Solution
A method and materials system that enhances corrosion resistance by forming a solid product layer on the solid material, maintaining the concentration of the solid product in the liquid at saturation or elevated levels, thereby reducing the thermodynamic driving force for dissolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oxygen-gettering agents and water-gettering agents are used to reduce corrosion, then corrosion resistance is improved, but system complexity and cost increase due to monitoring requirements and potential leaks
Solution Approach 1:
The invention converts the harmful effect of dissolved oxygen and water (which cause corrosion) into a beneficial mechanism by utilizing them to form protective solid product layers on the solid material surface. The corrosion products themselves become the protective barrier, transforming the harmful corrosion process into a beneficial protective mechanism.
Solution Approach 2:
The invention changes the concentration parameter of the solid product in the liquid from low to saturated or elevated levels. By maintaining saturated or elevated concentration of the solid product in the liquid, the thermodynamic driving force for further dissolution is reduced, thereby enhancing corrosion resistance without requiring complex monitoring systems.
2Reliability
If oxygen and water levels are monitored to ensure low levels, then corrosion resistance is improved, but operational cost increases
Solution Approach 1:
The system performs self-protection through the formation of solid product layers that automatically prevent further corrosion. The solid material itself serves its own protective function by forming a barrier layer, eliminating the need for external monitoring systems and reducing operational costs while maintaining corrosion resistance.
Solution Approach 2:
By maintaining saturated or elevated concentration of the solid product in the liquid, the system achieves passive corrosion protection. This parameter change eliminates the need for active monitoring and control systems, thereby reducing operational costs while preserving corrosion resistance.
3Reliability
If solid product layer is formed on solid material, then corrosion resistance is improved, but dissolution may occur if concentration in liquid is low
Solution Approach 1:
The invention changes the concentration parameter of the solid product in the liquid to saturated or elevated levels. This parameter change creates thermodynamic conditions where the solid product layer is stable and resistant to dissolution, as the liquid cannot accept more solid product at saturated concentration levels.
Solution Approach 2:
The invention converts the potential harmful dissolution process into a beneficial stabilization mechanism. By maintaining saturated or elevated concentration of the solid product in the liquid, the system transforms what would be a dissolution-driven process into a stability-maintaining process, preserving the solid product layer integrity.
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
Significantly reduces the corrosion rate of solid materials by maintaining an elevated or saturated concentration of the solid product in the liquid, preventing further dissolution and maintaining the integrity of the solid product layer.
Implementation Method 1
oxidation of one or more components of the solid material by the molten salt
Implementation Method 2
dissolution of one or more components of the solid material into the molten salt
Data Source
AI summary
A method for enhancing corrosion resistance of a solid material exposed to a liquid. The method includes providing a solid material which can form a solid product layer when exposed to the corrosive liquid, and maintaining the concentration of the solid product material in the liquid either at saturation or elevated level. A materials system containing a solid material capable of forming a solid product layer when exposed to air or a liquid environment containing dissolved oxygen at levels sufficient for oxidation of at least one constituent of the solid material, wherein the solid product layer is in contact with a liquid containing an elevated or saturated concentration of the dissolved solid product layer. A corrosion-resistant device containing a solid material with a solid-product layer exposed to a molten salt solution, wherein the concentration of the solid-product dissolved in the molten salt solution is at saturation or elevated level.