Figure 2-8 The Contact Angle (q) Is the Angle Between the Liquid and Solid Surface and is a Measure of the Wetting Ability

SECTION IV MECHANISM, PROPERTIES AND APPLICATION OF PENETRANT

Figure 2-9. The Rise or Depression of Liquid in a Capillary Tube Depends upon the Contact Angle

TM-1-1500-335-23 Nondestructive Inspection Methods Manual
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T.O. 33B-1-1 2-31 Figure 2-8 The Contact Angle (q) Is the Angle Between the Liquid and Solid Surface and is a Measure of the Wetting Ability. 2.4.3.1.3 Capillary Action. Capillary action is associated with wetting ability. When a tube with a small inside diameter is inserted into a liquid, the liquid level inside the tubing may rise above, remain even, or be lower than the outside liquid level. If the contact

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