Plated aluminum alloy, cylinder block thereof, plating line and plating method
First Claim
1. A pretreatment method for plating an aluminum alloy, which comprises the step of carrying out anodic electrolytic etching of a silicon-containing aluminum alloy to protrude silicon from a surface of the aluminum alloy, wherein the anodic electrolytic etching is carried out by using the silicon-containing aluminum alloy as an anode.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of plating an aluminum alloy, of which the steps are small in number and the productivity is improved as compared with conventional zincate conversion or anodic oxidation methods and which attains a decrease in cost and obviates the use of mixed acids, and a plated aluminum alloy of which the coating has excellent adhesion, the method comprising the steps of carrying out anodic etching of a silicon-containing aluminum alloy to protrude silicon from the surface of the aluminum alloy, optionally carrying out anodic oxidation of the aluminum alloy on its surface from which the silicon is protruded, and plating the aluminum alloy, and the plated aluminum alloy containing silicon in a state where the silicon bridges the aluminum alloy and the plating layer.
39 Citations
16 Claims
- 1. A pretreatment method for plating an aluminum alloy, which comprises the step of carrying out anodic electrolytic etching of a silicon-containing aluminum alloy to protrude silicon from a surface of the aluminum alloy, wherein the anodic electrolytic etching is carried out by using the silicon-containing aluminum alloy as an anode.
- 8. A method of plating an aluminum alloy, which comprises the steps of carrying out anodic electrolytic etching of a silicon-containing aluminum alloy to protrude silicon from a surface of the aluminum alloy and to form a concavo-convex shape on the surface of the aluminum alloy, and plating the aluminum alloy, wherein the anodic electrolytic etching is carried out by using the silicon-containing aluminum alloy as an anode.
- 15. A treatment line for plating an aluminum alloy, which comprises a degreasing portion, an electrolytic etching portion, a plating portion, and an anodic oxidation portion.
Specification