Page 33 - Liquid Penetration Inspection

Diploma in Mechanical Engineering (Material)

LIQUID PENETRATION INSPECTION

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Methods & Techniques

1. Cleaning methods

1. Oils 2. Metal smear

3. Penetrant removal
Klein showed that when a test specimen was

4. Selection of a developerion in
contaminated with cutting oil, there was a reduct
sensitivity even when the specimen was vapour

degreased before inspection. The specimens used

for this study were quenched cracked 2024

aluminium blocks. The reduction in sensitivity was

believed to be the result of incomplete removal of the

cutting oil from the defects.

Kleint, R. E., Deception by Penetrants, Materials Evaluation, Vol. 45, No. 7,
July 1987, pp. 845-847, 850.

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