ACR Stripping Solution Replenishment via Density Monitoring
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Solution Overview
Problem
The stripping effectiveness of advanced coating removal solutions diminishes over time due to chemical reaction and evaporation, necessitating a method to determine the correct amount of solution components and fresh water to replenish the bath and maintain stripping potential.
Innovation Solution
A method involving measuring the starting and final density and volume of the ACR stripping solution, followed by calculations to determine the amount of primary acid and fresh water to be added, using equations to restore the solution's original density and effectiveness, thereby rejuvenating the bath's stripping capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ACR stripping solution is used continuously to remove coatings, then coating removal effectiveness decreases over time due to chemical reaction and evaporation, but replacing the entire solution increases chemical costs and downtime
Solution Approach 1:
The patent monitors changes in solution density and volume parameters to determine the exact amount of primary acid and water needed for replenishment. By tracking these parameter changes over time, the system optimizes chemical consumption while maintaining stripping effectiveness, avoiding both complete replacement and insufficient replenishment.
Solution Approach 2:
The patent implements a feedback mechanism where density and volume measurements of the stripping solution are continuously monitored and used to calculate the precise replenishment requirements. This feedback loop ensures the solution is replenished accurately based on actual consumption patterns, reducing waste and maintaining performance.
2Measurement precision
If traditional titrations or elemental analysis are used to determine solution replenishment requirements, then measurement precision is achieved, but the process becomes time-consuming and reduces productivity
Solution Approach 1:
The patent replaces complex mechanical analysis systems (titrations, elemental analysis) with a simpler density and volume measurement system. This substitution maintains sufficient measurement precision for replenishment calculations while dramatically reducing the time required for analysis and enabling faster decision-making.
Solution Approach 2:
The patent extracts and focuses on only the critical parameters (density and volume) that are most indicative of solution depletion, rather than performing comprehensive analysis of all solution components. This extraction approach provides adequate information for replenishment while minimizing analysis time.
3Productivity
If the stripping bath is operated longer to extend bath life, then productivity increases, but the solution depletes faster requiring more frequent replenishment
Solution Approach 1:
The patent performs preliminary measurements of density and volume at the start of each operational cycle to establish baseline values. These preliminary actions enable accurate tracking of solution depletion throughout the bath life, allowing for timely and accurate replenishment that extends operational duration without compromising performance.
Solution Approach 2:
The patent employs dynamic monitoring and calculation of solution depletion based on real-time density and volume changes. This dynamic approach allows the system to adapt replenishment timing and quantity to actual consumption patterns, optimizing both bath life extension and chemical usage efficiency.
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 approach extends the bath life, reduces chemical costs and downtime, increases productivity, and decreases chemical discharge by accurately replenishing the stripping solution without the need for time-consuming titrations or elemental analysis.
Implementation Method 1
The coating is treated with an aqueous composition which includes an acid of the formula HxAF6... capable of removing substantially all of the coating material
Implementation Method 2
The effectiveness of advanced coating removal (ACR) stripping solutions diminishes over time due to chemical reaction and evaporation
Data Source
AI summary
A method for calculating the amount of solution components to add to an advanced coating removal (ACR) stripping solution in a coating removal stripping bath to replenish and recover stripping potential. The stripping effectiveness may be restored by the addition of only the primary acid of the composition of acids of the stripping bath and fresh water, in an amount necessary to restore the stripping solution to its original density.