Basically in Casting process, there is bound to be micro porosity. Even after through process control, One cannot eliminate the problem of porosity in casting, To eliminate leakages in critical parts like valves, Strainer, Housing, etc. SM install In-House Vacuum Impregnation Plant.
Die Penetration Test (DP Test)
Liquid penetrate testing is a non-destructive method used to detect surface breaking defects in any nonporous material. Liquid penetrate is applied to the surface and is drawn into defects by capillary action. Once a preset dwell time has passed, excess penetrate is removed and developer applied to draw out penetrate from defects. Visual inspection is then performed. Visible and Fluorescent Liquid Penetrate Examinations are Non-Destructive methods of revealing discontinuities that are open to the surfaces of solid and essentially non-porous materials, ferrous or non-ferrous.