| 摘要 |
FIELD: metallurgy. ^ SUBSTANCE: surface of items is cleaned from impurities; container is filled with items and zinc powder and arranged in heated furnace. Container is filled with items to 0.2-0.7 of its volume; zinc powder is loaded to container in quantity of 0.005-0.15 of mass of loaded items. In addition, zinc oxide is loaded to container in quantity of 0.005-0.2 of zinc powder mass, absorbent carbon powder in quantity of 0.005-0.1 of zinc powder mass, ammonia sulphate in quantity of 0.007-0.3 of zinc powder mass, ammonium chloride in quantity of 0.001-0.1 of zinc powder mass, and abrasive powder in quantity of 0.1-0.5 of zinc powder mass. After container is filled with items and enriching mixture, container is sealed, installed on the bench with possibility of being rotated about vertical axis and rotated during 5-10 minutes. Then, container is installed in furnace heated to temperature of 1.2-1.5 of zinc fusion temperature; container is rotated in furnace during 1-4 hours; after that, container is removed from furnace, installed on the bench and rotated with simultaneous air blowing during 1-5 hours; after that, items are removed from container; excess zinc powder is removed from their surface; items are placed into solution containing orthophosphoric acid; then, items are washed and dried. ^ EFFECT: improving zinc-plating efficiency and providing improved corrosion resistance of surface protective zinc coating on items working in severe atmospheric conditions. ^ 8 cl |
