LI Da-dong, YU Teng-yi. ANALYSIS OF SURFACE DISCOLORATION OF GALVANIZING SHEET STEEL CAUSED BY UNFAVORABLE BRAZING HEATING[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2007, 43(4): 176-178.
Citation:
LI Da-dong, YU Teng-yi. ANALYSIS OF SURFACE DISCOLORATION OF GALVANIZING SHEET STEEL CAUSED BY UNFAVORABLE BRAZING HEATING[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2007, 43(4): 176-178.
LI Da-dong, YU Teng-yi. ANALYSIS OF SURFACE DISCOLORATION OF GALVANIZING SHEET STEEL CAUSED BY UNFAVORABLE BRAZING HEATING[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2007, 43(4): 176-178.
Citation:
LI Da-dong, YU Teng-yi. ANALYSIS OF SURFACE DISCOLORATION OF GALVANIZING SHEET STEEL CAUSED BY UNFAVORABLE BRAZING HEATING[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2007, 43(4): 176-178.
ANALYSIS OF SURFACE DISCOLORATION OF GALVANIZING SHEET STEEL CAUSED BY UNFAVORABLE BRAZING HEATING
The reason of the end of galvanizing sheet steel becoming dark and bright,when copper tube of air conditioner was brazing,was investigated by stereomicroscope and SEM. The result showed that the color changing was caused by Zn-Fe alloy in brazing flame heating,it showed that fine cracks existed in dark zone and the end of sheet with low corrosion resistant in salt spray test.
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