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Analysis of Error & Life Prediction of Corroded Metal Plate using NDT Technique

Author(s):

Purnendra Srivas , Bhilai Institute of Technology,Durg; Devesh Shrivastava, Bhilai Institute of Technology,Durg

Keywords:

NDT, UT, Corrosion

Abstract

This paper summarizes some of the major aspects of precision ultrasonic thickness gauging. Ultrasonic nondestructive testing (NDT) characterizing material thickness, integrity, or other physical properties by means of high-frequency sound waves has become a widely used technique for quality control. In thickness gauging, ultrasonic techniques permit quick and reliable measurement of thickness without requiring access to both sides of a part. Corrosion is one of the serious problem affecting ship, pipe line and aviation industries. It affects the body of ship and thickness of pipe and an Aeroplane wings, surface, between joints and fasteners. The presences of corrosion underneath the paints of surface and between joints are not easy to be detected. The unnoticed presence of corrosion may cause many accidents leading to human and money loses. To detect the thickness of the metal surface, various methods and tests are used. These tests conducted should be such that it does not destroy or disassemble the equipment to parts or damage its surface Hence for the further use of the equipment, Non-destructive tests (NDT) are carried out. In the field of NDT industry one of the most important method to detect the thickness of component is the ultrasonic thickness measurement. The change in the thickness of any plate with respect to the time is also helpful for determining the corrosion rate and prediction of remaining life of corroded plate as well as prediction for the measurement error due to corrosion of any steel plate. Mild Steel is one of the major construction materials used in the industries. This thesis focuses on the experimental study of the corrosion behaviour and mechanism for mild steel in three different media namely: 0.1M of Hydrochloric acid, Atmosphere, Salt water (Nacl). Mild steel of length 12 cm and 10 cm width and 6 mm thick was used for this experiment and studied for a period of one year interval of each three month weighing and re-immersing. The weight losses were tabulated and analysed graphically. Any suitable NDE technique, such as ultrasonic may be used as long as it will provide minimum thickness determinations.

Other Details

Paper ID: IJSRDV3I40562
Published in: Volume : 3, Issue : 4
Publication Date: 01/07/2015
Page(s): 847-853

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