When it comes to important machine components, corrosion can become a very costly issue and a major safety hazard if it is not dealt with in a timely manner. Luckily, there are a few non-destructive testing (NDT) methods that can be used to detect corrosion in metals in a quick and reliable manner. Read all you need to know about the NDT for corrosion detection below:
Visual inspection
One of the most common methods of NDT is visual testing. Visual testing is one of the first lines of defence against various defects including corrosion. Unfortunately, this NDT method does not come without its limitations. Any areas of the material being inspected that are not completely visible are incredibly challenging, making this method an inefficient means of NDT for enclosed systems.
Radiographic testing
Radiographic testing is another NDT method that is commonly used. This type of method is highly effective in finding discontinuities in various types of workings in metals including welds, forgings and more. The enhancements in this form of testing have led to digital radiography which has greatly reduced the costs of this method while improving its accuracy.
Eddy current testing
An enhanced form of eddy current testing known as eddy current array (ERA) is the ideal NDT method to use when attempting to uncover multilayer corrosion in aerospace. Using the right equipment, this technique can identify corrosion in the most difficult places. This method is also highly effective in reducing inspection time.
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