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Application |
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Most weld discontinuities open to or near the surface. |
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Most suitable for cracks and other linear conditions. |
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Advantage |
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Relatively economical and expedient. |
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Test equipment is considered portable. |
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Unlike liquid penetrants, magnetic particle can detect some near surface discntinuities. |
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Can inspect through thin coatings. |
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Limitations |
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Applicable only to ferromagnetic materials. |
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Parts should be clean before and afer inspection. |
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Thick coatings may mask rejectable indications. |
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Some applications require parts to be demagnetised after inspection. |
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Magnetic particle test requires use of electrical energy for most applications. |
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Some potential for arc strikes on surfaces. |
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