Copper based waterborne wood preservatives increase the corrosion of metals embedded or in contact with the treated wood. We examine wood that was in contact with corroding metal with synchrotron based X-ray fluorescence microscopy (XFM) and X-ray Absorption Near Edge Spectroscopy (XANES) to test if the proposed corrosion mechanism is correct.
Chemically Bonded Phosphate Ceramic coating was investigated in various environments such as inland, beach and salt-fog exposure. After 8-month outdoor testing, the coating was evaluated by visual inspection, coating thickness, adhesion measurement and X-ray diffraction. Long term testing ensued, up to 24 months.
Direct energy deposition processes that utilize wire feedstock have been deployed to deposit and fabricate near net shape functional metal parts at high deposition rates. Is this just multi-pass welding or is there more to it? Should the material requirements for additive be the same as those defined for welding? Is weld quality the same as part quality? A large metal additive part fabricated using a robotic wire arc additive system will be used to demonstrate the similarities and identify critical differences between essential variables for welding and additive manufacturing. The opportunities for both welding and additive manufacturing to learn and leverage one another to develop unique and novel materials, process controls and further fundamental understanding of metal deposition processes will be outlined.