Figure 1
Figure 2
Figure 3
Figure 4
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Figure 9
Corrosion parameters of the samples_
| Sample | Corrosion current I к (µA/cm2) | Free corrosion potential E к (V) | Corrosion rate (mm/year) |
|---|---|---|---|
| Steel 45 | 3.3807 × 10−5 | 0.492 | 0.3966 |
| 1 | 3.484 × 10−5 | 0.43016 | 0.40872 |
| 2 | 2.1462 × 10−5 | 0.46569 | 0.25178 |
| 3 | 1.0961 × 10−5 | 0.43251 | 0.12859 |
Porosity values of the obtained coatings_
| Sample | Average pore size (nm) | Porosity percentage (%) |
|---|---|---|
| No. 1 | 45.474 | 2.536 |
| No. 2 | 20.028 | 1.776 |
| No. 3 | 19.060 | 1.018 |
Chemical composition of 30HGSA grade steel_
| C (%) | Mn (%) | Si (%) | S (%) | P (%) | Cr (%) | Ni (%) |
|---|---|---|---|---|---|---|
| 0.25–0.35 | 0.8–1.2 | 0.8–1.2 | ≤0.025 | ≤0.025 | 0.8–1.2 | ≤0.4 |
Regimes of 30HGSA coating application by EAM_
| Sample | Voltage (V) | Current (A) | Wire feed speed (cm/s) | Compressed air pressure (atm) | Spraying distance (mm) | Number of samples |
|---|---|---|---|---|---|---|
| No. 1 | 100 | 4 | 8 | 150 | 3 | |
| No. 2 | 43 | 200 | 8 | 3 | ||
| No. 3 | 300 | 16 | 3 |