Thermal Spray Coating Corrosion Testing With ICP Feedback
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Solution Overview
Problem
Existing thermal spray coating methods for enhancing corrosion resistance in acidic environments yield inconsistent performance due to variations in process conditions, leading to potential damage or inadequate protection of parts.
Innovation Solution
A method involving thermal spray coating, immersion in acid solutions, and inductively coupled plasma (ICP) analysis to evaluate corrosion resistance by collecting and analyzing acid solution components at regular intervals, using masking to isolate non-coated edges, and selecting appropriate acid concentrations and immersion durations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal spray coating is applied to enhance corrosion resistance, then corrosion protection is improved, but coating performance shows large differences due to process condition variations
Solution Approach 1:
The patent systematically varies multiple process parameters including coating thickness (10-3000 μm), immersion time (10-30 days), acid concentration, and heating temperature (200-800°C) to establish optimal coating conditions. By changing these parameters, the patent achieves consistent corrosion resistance evaluation while accounting for process variations.
Solution Approach 2:
The patent implements a feedback mechanism by measuring corrosion resistance at multiple time points during immersion (24 hours, 7 days, 14 days, 30 days) and using ICP analysis to quantify coating degradation. This feedback data allows for evaluation of coating performance consistency and identification of optimal coating parameters.
2Reliability
If coating thickness is increased to improve protection, then corrosion resistance is improved, but coating integrity may be damaged due to peeling
Solution Approach 1:
The patent investigates the relationship between coating thickness and corrosion resistance by testing various thickness levels (10-3000 μm). This parameter variation allows identification of the optimal thickness that provides sufficient protection without causing peeling or integrity damage.
Solution Approach 2:
The patent applies masking to non-spray coated edge regions before immersion testing. This preliminary action prevents acid solution contact with uncoated edges, ensuring that observed corrosion is due to coating degradation rather than edge exposure, thereby maintaining coating integrity during thick coating tests.
3Measurement precision
If immersion time is extended to evaluate long-term corrosion resistance, then evaluation accuracy is improved, but test duration and resource consumption increase
Solution Approach 1:
The patent performs preliminary masking of non-coated edges before immersion, which prevents edge corrosion and allows the main coating body to be evaluated without the confounding effect of edge degradation. This preliminary preparation enables accurate long-term corrosion evaluation.
Solution Approach 2:
The patent establishes a feedback mechanism with multiple measurement time points (24 hours, 7 days, 14 days, 30 days) during immersion testing. By collecting data at these intervals, the patent can determine when sufficient corrosion resistance evaluation has been achieved, allowing termination of the test at the optimal time point rather than requiring extended testing.
4Measurement precision
If ICP analysis is performed at multiple time points to track corrosion progression, then measurement precision is improved, but analysis complexity and cost increase
Solution Approach 1:
The patent uses ICP analysis as a feedback mechanism to quantify coating degradation at multiple time points. By measuring metal ion concentrations in the acid solution at 24 hours, 7 days, 14 days, and 30 days, the patent tracks corrosion progression with high precision while managing analysis complexity through systematic scheduling.
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
Accurately evaluates corrosion resistance over time, reducing inaccuracies from incomplete reactions and internal corrosion, and providing high precision in determining coating integrity and protection.
Implementation Method 1
coating one or more sides of a sample by a thermal spray coating method to form a thermal spray coated sample
Implementation Method 2
analyzing components of the acid solution by collecting the acid solution at regular intervals after the immersion. Herein, the analysis is performed by an inductively coupled plasma (ICP) analysis method
Data Source
AI summary
A method for evaluating corrosion resistance of a thermal spray coating, the method including (a) coating one or more sides of a sample by a thermal spray coating method to form a thermal spray coated sample; (b) immersing the thermal spray coated sample in an acid solution; and (c) analyzing the components of the acid solution by collecting the acid solution at regular intervals after immersion. The analysis is performed by an inductively coupled plasma (ICP) analysis method. Based on the method, accuracy of evaluating the corrosion resistance of the thermal spray coating can be improved, and the method of evaluating the corrosion resistance of the thermal spray coating can be simplified.