Pretreatment method of aluminum alloy coil
AssigneesJun Chen, Shanghai Mingjie Chem-Technologies Co., Ltd.
InventorsJun Chen, Jie Chen, Conglin Xia, Ruijie Mao
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Abstract
The invention relates to the technical field of aluminum alloy surface treatment, in particular to the technical field of IPC C23C, and more specifically to a pretreatment method of an aluminum alloy coil. The invention can improve adhesion of an adhesive and weldability of an aluminum alloy at the same time through a specific pretreatment method combined with a specific treatment solution, and an aluminum alloy substrate after pretreatment has good compatibility with subsequent permanent anti-corrosion treatment, so that the pretreatment method is very suitable for welding or bonding of aluminum alloy parts of automobile bodies.
Claims9
A pretreatment method of an aluminum alloy coil, comprising:
- S1 cleaning a surface of the aluminum alloy coil;
- S2 washing the surface of the aluminum alloy coil with deionized water;
- S3 treating the surface of the aluminum alloy coil with a treatment solution;
- S4 washing the surface of the aluminum alloy coil with deionized water;
- and
- S5 drying,
- wherein
- treatment solution in the step S3 is a phosphonic compound solution, with one or more phosphonic compound structures of (OH)2OP—(CH2)X—PO(OH)2, and —(CH2)X— is a saturated straight-chain alkyl group, and
- X is 8-16.
Dependencies are inferred from the claim text.