Research Article
Development of Epoxy Based Surface Tolerant Coating Improvised with Zn Dust and MIO on Steel Surfaces
Table 6
Comparative corrosion test results of different kinds of surface tolerant coatings.
| | Systems | Salt spray test (SST) | Log (/Ohm) | Corrosion rate
(mpy-miles per year) | | 0–500 hours | 500–1000 hours | 1000–2000 hours | 0 hour | 500 hours | 1000 hours | 2000 hours |
| | Benchmark 1 | Initiation of blistering at 300 hours | Number of blisters incresed | Large blisters at the centre and edges. | 6.5 | 4.8 | 3.8 | 2 | 3.036 mpy |
| | Benchmark 2 | Initiation of blistering at 350 hours | Number of blisters incresed | Number of blisters increased | 5.5 | 4.2 | 3.3 | 2.9 | 0.795 mpy |
| | Benchmark 3 | No blistering | Large blisters at the centre and edges | Large number of small edges | 3.8 | 3.2 | 3 | 2.9 | 0.420 mpy |
| | STC1 | No blistering | No blistering | Initiation of blistering at 1600 hours | 7.5 | 4.8 | 4.2 | 4.1 | 0.133 mpy |
| | STC2 | No blistering | No blistering | Initiation of blistering at 1500 hours | 6.5 | 5.5 | 4.8 | 4.1 | 0.311 mpy |
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