CO_2 laser brazing galvanized steel sheets with different spot modes
On the basis of finding that lead is the vital factor to bring patina on galvanized steel sheets, two hypothesizes, colloid film of lead sulfate and the codeposition of zinc and lead, were employed.
As of January 13, about 46,000 pieces of galvanized steel sheet have been sent to those areas to build makeshift shelters.
Coating surface defect on hot-dip galvanized steel sheet and its preventive measures