Investigation of Lifetime Testing using Microscopy Techniques : Stainless Steel Corrosion Predicted by CuSO4.5H2O and K3[Fe(CN)6 Tests
Kerbawy, Kelsey F.
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In the medical device industry, there is a specific need for visible and permanent product identification. For stainless steel devices, the laser marking process (LM) sufficiently identifies products. The physical phenomena leading to a conspicuous laser mark were previously studied, along with the establishment of a status quo in verifying the laser mark’s expected lifetime. The experiment explores beyond those findings, by actively searching for a simpler quality assurance technique using either chemical reactivity tests, microscopy and spectroscopy, or in combination. We utilized 0.06 M CuSO4.5H2O and 0.03 M K3[Fe(CN)6] to test corrosive reactivity, and operated Laser Scanning Confocal Microscopy and Scanning Electron Microscopy coupled Energy Dispersive X-ray Spectroscopy for analytical means. The results provide evidence for a novel validation and verification scheme for austenitic stainless steel.