INTRODUCTION

Eddy current (ECT) technology is a noncontact method for the inspection of metallic parts. In this technique, the probe, which is excited with an alternative current, induces eddy current in the part under inspection. Any discontinuities or material property variations that change the eddy current flow in the part are detected by the probe as a potential defect.

Over the years, probe technology and data processing have continuously progressed so that the eddy current technique is now recognized to be fast, automotive, petrochemical, and power generation industries for the detection of surface or near-surface defects in material such as aluminum, stainless steel, copper, titanium, brass, inconel, and even carbon steel (surface defect only.)

CONTENT

A. TRAINING, EXAMINATION AND CERTIFICATION LEVEL 2

General Theory:

• Brief History of Testing
• Basic Principles of Testing
• Generation of eddy currents by means of an AC field
• Effect of fields created by eddy currents
• Effect of change of impedance on instrumentation
• Terminology and units
• Principles of magnetisation.
• Magnetisation - electromagnetism theory
• Flux leakage theory and principle
• Readout Mechanism
• Types of Eddy Current Sensing Elements
• Types of Flux Leakage Sensing Elements
• Review of Electromagnetic Theory
• Factors that affect Coil Impedance
• Factors that affect Flux Leakage Fields
• Signal-to-Noise Ratio
• Selection of Test Frequency
• Selection of Method of Magnetisation for Flux
• Leakage Testing
• Coupling
• Field Strength and Its Selection
• Field Orientation for Flux Leakage Testing
• Instrument Design Consideration
• Safety as applicable to Eddy Current Testing and Electrical Safety

Specific Theory: Application of the Method to the Specific requirements of the Company, in particular making reference to those Codes, Specifications and Procedures used by the Company, including the relevant control checks.

Duration of training course : 11 training days + 1 examination day
Fees per person: 770 USD