Laser Powder Deposition (LPD) is an advanced manufacturing process where metallic and/or ceramic powders are injected into a small molten pool produced by a focused laser beam. A computer-controlled robot controls the position of the molten pool, which allows for sequential layering that produces solid free form shapes directly from a CAD/CAM interface. The process parameters are implemented to control the molten pool size by changing the laser processing parameters (i.e. laser power, traverse speed and layer thickness). This work evaluated the corrosion behavior of laser powder deposited 316L stainless steels deposited at different laser processing parameters. The susceptibility of intergranular corrosion (IGC) of laser deposited 316L stainless steel bulk builds is studied by hot boiling sulfuric acid sensitization test. The pitting corrosion behavior of laser deposited 316L stainless steel thin walls is studied by cyclic potentiodynamic polarization methods. From this, the corrosion potential, and current density are calculated. These are related to laser processing parameters. The wrought 316L stainless steel is also tested for comparative study with laser deposited specimens. The laser deposited specimens are about 30% more corrosion resistant than the wrought materials.
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