Development of an alternative for corrosive resistant galvanized steel compatible for laser welding

Atmospheric corrosion and impact toughness of steels: Case study in steels with and without galvanizing, exposed for 3 years in Rapa Nui Island

“…In the cutting micrograph (right side), corrosion products are observed that protrude through the level of the material and vary in thickness along the galvanizing, increasing its thickness depending on exposure time (between 5 and 15 μm thick). X-ray Diffraction indicated that in the first year of exposure, the steel has Zincite (ZnO), a common corrosion product of zinc in marine areas with low contaminants [ [64] , [65] , [66] , [67] , [68] , [69] ]. Later, after three years of exposure, in addition to zincite, hydrozincite (Zn(OH) 2 ) and simonkolleite (Zn 5 (OH) 8 Cl 2 xH 2 0) were found.…”

A Novel Method of Defect Detection Based on Experimental Investigation of Galvanized Steel Welded Plates Using Wobble Laser Process

“…The leading cause of this problem is the evaporation of zinc contained in the protective layers during welding. Based on the literature, the difference between the melting point of Fe (1538 ⁰ C) and Zn (906 ⁰C) causes critical problems such as the generation of ZnO, which stimulates the formation of spatters during laser welding of galvanized sheets [13]. In this regard, Song et al [14] designed a new setup (panda beam), which is a mixture of two Bragg gratings in dissimilar guidelines to make a splitting beam.…”

“…Figure13. Porosity analysis using a micro-indentation matrix pattern over a welding cross-section[41].…”