Abstract
Ultrasonic testing is one of the commonest method of nondestructive evaluation of quality of the composite materials in service and before service. Ultrasonic attenuation is commonly used for evaluating the soundness of materials under test. The present paper describes the results obtained from the experiments which were conducted in order to study the effect of sulphuric acid and sodium chloride on GRP composite by ultrasonic through transmission technique. The results show that the percentage increase in ultrasonic attenuation and percentage reduction in strength of GRP composite increases with increasing the immersion time of GRP specimens in different concentration of sulphuric acid and sodium chloride. The effect of sulphuric acid is more pronounced as compared to sodium chloride.
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