Corrosion-resistant member
There is provided a corrosion-resistant member in which a corrosion-resistant coating film is less likely to peel off from a base material even when the corrosion-resistant member is subjected to a thermal history. The corrosion-resistant member includes: a base material ( 10 ) containing aluminum or an aluminum alloy; and a corrosion-resistant coating film ( 20 ) formed on the surface of the base material ( 10 ), in which the corrosion-resistant coating film ( 20 ) contains aluminum fluoride hydroxide AlF 3-x (OH) x in which a space group belongs to R-3c, and x in the chemical formula is 0.05 or more and 1.00 or less.
1. A corrosion-resistant member comprising:
a base material containing aluminum or an aluminum alloy; and
a corrosion-resistant coating film formed on a surface of the base material, wherein the corrosion-resistant coating film contains aluminum fluoride hydroxide AlF 3-x (OH) x in which a space group belongs to R-3c, and x in the AlF 3-x (OH) x is 0.05 or more and 1.00 or less.
2. The corrosion-resistant member according to claim 1 , wherein x in the AlF 3-x (OH) x is 0.10 or more and 0.70 or less.
3. The corrosion-resistant member according to claim 2 , wherein a half width of a maximum intensity peak obtained by analyzing the aluminum fluoride hydroxide by an X-ray diffraction method is 0.50° or less.
4. The corrosion-resistant member according to claim 2 , wherein
the base material contains an aluminum alloy containing magnesium, and
an intermediate layer containing magnesium fluoride is arranged between the base material and the corrosion-resistant coating film.
5. The corrosion-resistant member according to claim 1 , wherein x in the AlF 3-x (OH) x is 0.15 or more and 0.50 or less.
6. The corrosion-resistant member according to claim 5 , wherein a half width of a maximum intensity peak obtained by analyzing the aluminum fluoride hydroxide by an X-ray diffraction method is 0.50° or less.
7. The corrosion-resistant member according to claim 5 , wherein
the base material contains an aluminum alloy containing magnesium, and
an intermediate layer containing magnesium fluoride is arranged between the base material and the corrosion-resistant coating film.
8. The corrosion-resistant member according to claim 1 , wherein a half width of a maximum intensity peak obtained by analyzing the aluminum fluoride hydroxide by an X-ray diffraction method is 0.50° or less.
9. The corrosion-resistant member according to claim 8 , wherein
the base material contains an aluminum alloy containing magnesium, and
an intermediate layer containing magnesium fluoride is arranged between the base material and the corrosion-resistant coating film.
10. The corrosion-resistant member according to claim 1 , wherein
the base material contains an aluminum alloy containing magnesium, and
an intermediate layer containing magnesium fluoride is arranged between the base material and the corrosion-resistant coating film.