Production technology for raising corrosion resistance of aluminium tubes

• Main Author: HUANG AIHUA
• Format: Patent
• Language: Chinese; English
• Published: 11.07.2012
• Subjects: APPARATUS THEREFOR; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a production technology for raising corrosion resistance of aluminium tubes, comprising the following steps: carrying out solution treatment on the aluminium tubes with the solid solution temperature of 400-450 DEG C and the solid solution time of 30-180 min, using water as a quenching medium with the water temperature of 20-45 DEG C, limiting the time of moving from solution treatment to quenching treatment to 1-15 s, carrying out aging treatment by using a cycle stirring oil bath furnace with the aging temperature of 90-140 DEG C and the aging time of 17-29 h; removing oil and washing with clear water; putting the aluminium tubes in a sulfuric acid solution, and limiting the solution temperature to 20-25 DEG C, wherein the specific gravity of the solution is about 1.128-1.135; soaking all the aluminium tubes in the solution for 30-35 min under a 15-20V voltage; then taking out the aluminium tubes and washing with clear water, and immersing into clear water; and then immediately immers