Hot dip galvanizing processing have remained almost unchanged since over 200 years, but in the last years the attention to environmental topics, leads new approach solution in classical protection techniques, introducing innovative way oriented to optimize different coating properties. Hot-dip galvanizing is a classical processing to generate coatings on iron-based, but many secondary metals added in the bath, for examples Pb important to fluidizing the bath, are dangerous for human health and sometimes is replaced by Sn. Hot dip zinc coated ipersandelin steel specimens were investigated in this work in order to identify the main damaging micromechanisms in intermetallic phases at three different bending angles, considering both chemical composition and intermetallic phases distribution influences. Longitudinal sections of bended specimens were observed by means of a LOM (Light Optical Microscope) and main damage micromechanisms, identified as longitudinal and radial cracks was evaluated.
Sn and Ti influence in bending cracks path in hot dip galvanizing coatings
DI COCCO, Vittorio;IACOVIELLO, Francesco;
2012-01-01
Abstract
Hot dip galvanizing processing have remained almost unchanged since over 200 years, but in the last years the attention to environmental topics, leads new approach solution in classical protection techniques, introducing innovative way oriented to optimize different coating properties. Hot-dip galvanizing is a classical processing to generate coatings on iron-based, but many secondary metals added in the bath, for examples Pb important to fluidizing the bath, are dangerous for human health and sometimes is replaced by Sn. Hot dip zinc coated ipersandelin steel specimens were investigated in this work in order to identify the main damaging micromechanisms in intermetallic phases at three different bending angles, considering both chemical composition and intermetallic phases distribution influences. Longitudinal sections of bended specimens were observed by means of a LOM (Light Optical Microscope) and main damage micromechanisms, identified as longitudinal and radial cracks was evaluated.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
