Prediction and Analysis of the Grit Blasting Process on the Corrosion Resistance of Thermal Spray Coatings Using a Hybrid Artificial Neural Network
Abstract
:1. Introduction
2. Experimental and Modeling
2.1. Sample Preparation and Characterization
2.2. BP Neural Network Model Optimized by Genetic Algorithm
- The basic framework of the BP neural network is set up by setting the number of neurons in the input, hidden and output layers.
- Coding. The expression of the coding length is given by
- Determine the fitness function to estimate the dominance of individuals in the population. In this study, the mean square error of the predictive index of the BP model is chosen to design the fitness function.
- Set the GA parameters, including the population size, the number of iterations, the mutation probability and the crossover probability, and perform population initialization.
- Calculate the fitness value mentioned in Step (3) and use this value as the execution basis for population selection, crossover and mutation. If the termination condition is reached, stop the calculation; if the termination condition is not reached, the fitness function is recalculated until the termination condition is met.
- The optimal individual is decoded into the initial weight and threshold of the BP model. After the training is completed, the BP model is tested, analyzed and obtained.
3. Results and Discussion
3.1. Influence of Grit Blasting Parameters on the Corrosion Resistance
3.2. Analysis of the Training and Prediction Process of BP and GA–BP Model
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Process Parameter | Range of Value |
---|---|
Grit size (mesh) | 40, 80, 120, 160 |
Blast pressure (MPa) | 0.4, 0.5, 0.6, 0.7 |
Blasting distance (mm) | 50, 100, 150, 200 |
Blasting time (s) | 15, 30, 45, 60 |
Blasting angle (°) | 45, 60, 75, 90 |
Spraying Parameter | Value |
---|---|
Spraying distance (mm) | 100 |
Spraying power (KW) | 30 |
Particle size of the alumina powder (μm) | 25–45 |
Primary air flow (Ar) (L/min) | 45 |
Auxiliary air flow (H2) (L/min) | 17.5 |
Powder feeder speed (r/min) | 25 |
Number of preheating channels | 2 |
Sample | Grit Blasting Process Parameter | Structure Property | Corrosion Resistance Performance | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Grit Size (Mesh) | Pressure (MPa) | Distance (mm) | Time (s) | Blasting Angle (°) | Roughness Rz (μm) | Adhesion Strength (MPa) | Bubbling Time (h) | Cracking Time (h) | Flaking Time (h) | |
1 | 40 | 0.7 | 150 | 30 | 75 | 17.28 ± 2.12 | 18.92 ± 1.92 | 15 | 18 | 42 |
2 | 80 | 0.7 | 150 | 30 | 75 | 16.48 ± 1.88 | 16.98 ± 1.61 | 18 | 24 | 48 |
3 | 120 | 0.7 | 150 | 30 | 75 | 8.86 ± 0.99 | 16.73 ± 1.59 | 13 | 16 | 39 |
4 | 160 | 0.7 | 150 | 30 | 75 | 5.62 ± 0.83 | 16.37 ± 1.51 | 7 | 10 | 28 |
5 | 80 | 0.4 | 150 | 30 | 75 | 8.16 ± 1.05 | 15.24 ± 1.71 | 9 | 12 | 32 |
6 | 80 | 0.5 | 150 | 30 | 75 | 11.98 ± 1.96 | 18.04 ± 1.86 | 12 | 18 | 42 |
7 | 80 | 0.6 | 150 | 30 | 75 | 14.06 ± 1.64 | 19.66 ± 2.03 | 15 | 20 | 44 |
8 | 80 | 0.7 | 50 | 30 | 75 | 8.34 ± 1.08 | 18.13 ± 1.90 | 10 | 14 | 25 |
9 | 80 | 0.7 | 100 | 30 | 75 | 13.22 ± 1.57 | 17.42 ± 1.64 | 15 | 20 | 39 |
10 | 80 | 0.7 | 200 | 30 | 75 | 13.6 ± 1.46 | 18.38 ± 1.75 | 16 | 21 | 41 |
11 | 80 | 0.7 | 150 | 15 | 75 | 10.9 ± 1.48 | 14.74 ± 1.32 | 13 | 20 | 38 |
12 | 80 | 0.7 | 150 | 45 | 75 | 14.48 ± 1.86 | 19.01 ± 1.98 | 17 | 23 | 46 |
13 | 80 | 0.7 | 150 | 60 | 75 | 11.13 ± 1.61 | 18.19 ± 1.85 | 19 | 23 | 45 |
14 | 80 | 0.7 | 150 | 30 | 45 | 11.32 ± 1.35 | 18.04 ± 1.73 | 16 | 22 | 44 |
15 | 80 | 0.7 | 150 | 30 | 60 | 12.11 ± 1.44 | 17.77 ± 1.67 | 18 | 23 | 46 |
16 | 80 | 0.7 | 150 | 30 | 90 | 9.33 ± 1.14 | 16.36 ± 1.52 | 17 | 24 | 38 |
Prediction Performance | R | MSE | MSPE | MAPE |
---|---|---|---|---|
Adhesion strength | 0.9552 | 0.1532 | 0.0087 | 0.0131 |
Surface roughness | 0.9589 | 0.3400 | 0.0414 | 0.0515 |
Bubbling time | 0.9685 | 0.5600 | 0.0434 | 0.0781 |
Cracking time | 0.9088 | 1.7421 | 0.1390 | 0.2348 |
Flaking time | 0.9066 | 0.5277 | 0.0250 | 0.0380 |
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Ye, D.; Xu, Z.; Pan, J.; Yin, C.; Hu, D.; Wu, Y.; Li, R.; Li, Z. Prediction and Analysis of the Grit Blasting Process on the Corrosion Resistance of Thermal Spray Coatings Using a Hybrid Artificial Neural Network. Coatings 2021, 11, 1274. https://doi.org/10.3390/coatings11111274
Ye D, Xu Z, Pan J, Yin C, Hu D, Wu Y, Li R, Li Z. Prediction and Analysis of the Grit Blasting Process on the Corrosion Resistance of Thermal Spray Coatings Using a Hybrid Artificial Neural Network. Coatings. 2021; 11(11):1274. https://doi.org/10.3390/coatings11111274
Chicago/Turabian StyleYe, Dongdong, Zhou Xu, Jiabao Pan, Changdong Yin, Doudou Hu, Yiwen Wu, Rui Li, and Zhen Li. 2021. "Prediction and Analysis of the Grit Blasting Process on the Corrosion Resistance of Thermal Spray Coatings Using a Hybrid Artificial Neural Network" Coatings 11, no. 11: 1274. https://doi.org/10.3390/coatings11111274