• In this process a fluorescent penetrating oil mix by whiting powder is apply to casting surface by spraying, dipping, or brushing. Cracks or other defects become visible after surface has been wipe dry (the oil creeping out of cracks). g. Eddy Current Inspection Eddy current inspection materials of casting require not be ferromagnetic. Test includes a probe which is supplied by a high frequency current. It induce an electric field in casting. Field changes in presence of surface or near surface defects. These changes show up on instruments.
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Inspection of Castings
• In this process a fluorescent penetrating oil mix by whiting powder is apply to casting surface by spraying, dipping, or brushing. Cracks or other defects become visible after surface has been wipe dry (the oil creeping out of cracks). g. Eddy Current Inspection Eddy current inspection materials of casting require not be ferromagnetic. Test includes a probe which is supplied by a high frequency current. It induce an electric field in casting. Field changes in presence of surface or near surface defects. These changes show up on instruments.
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