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The interrelation between surface tension and wetting of a solid surface and corresponding wetting behavior.
| Quantitative Equation | Contact Angle Relationship | Overall Prediction (State) |
|---|---|---|
| γSV − γSL > 0 | 0° ≤ θ ≤ 90° | High wettability |
| γSV − γSL > γLV | θ = 0° | Complete wetting (spreading) |
| γSV − γSL < 0 | 90° ≤ θ ≤ 180° | Low wetting |
| γSL − γSV > γLV | θ = 180° | No wetting |
