Quality control

Abstract

Magnetic particle inspection in common with all forms of testing forms part of the programme of quality control in the manufacture of ferromagnetic materials, structures and components. It is somewhat surprising that, in many cases, it is regarded as a separate process from manufacture rather than an integral part of the total manufacturing process. While most people seem to think of magnetic particle inspection and other test procedures as methods for finding defects it is interesting to reverse the emphasis and point out that test procedures, particularly non-destructive tests, are used to ensure that good materials, structures and components are released for their intended use. It is both understandable and surprising to find that manufacturers of items are reluctant to allow photographs of indications of defects in their items if their name can be seen. On the one hand the reluctance to admit that anything of their manufacture could be defective is understandable but a little thought on the matter might suggest that the fact that their products are tested should be good for their reputation.