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Corrosion Resistance of Tannic Acid Passivation Coating on Tannic acid passivating solution containing HNO3,NH4F and ZrOCl2 as the auxiliary ingredients was formulated and used to prepare tannic acid conversion coating on galvanized steel sheet.The optimized passivation process was established based on immersion tests.The morphology of the conversion coating was observed using a scanning electron microscope.The corrosion resistance of the conversion
results for this questionFeedbackASTM A36 Steel Plate Thickness Price. ASTM A36/A36M description This is a type of weldable carbon engineering structural steel.Its carbon content is usually less than 0.25%,higher than ordinary carbon structural steel yield point s or yield strength 0.2 (30 ~ 80kgf/mm2) and yield ratio s/b (0.65 ~ 0.95),its better in the hot and cold machinability,good
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