Corrosion-resistant member

Patent metadata

Field	Value
Publication number	US-11859288-B2
Application number	US-202017611768-A
Country	US
Kind code	B2
Filing date	Sep 3, 2020
Priority date	Oct 7, 2019
Publication date	Jan 2, 2024
Grant date	Jan 2, 2024

Abstract

A corrosion-resistant member including: a metal base material ( 10 ); a corrosion-resistant coating ( 30 ) formed on the surface of the base material ( 10 ); and a buffer layer ( 20 ) formed between the base material ( 10 ) and the corrosion-resistant coating ( 30 ). The base material ( 10 ) contains a main element having the highest mass content ratio among elements contained in the base material ( 10 ) and a trace element having a mass content ratio of 1% by mass or less. The corrosion-resistant coating ( 30 ) contains at least one kind selected from magnesium fluoride, aluminum fluoride, and aluminum oxide. The buffer layer ( 20 ) contains an element of the same kind as the trace element, and the content ratio obtained by energy dispersive X-ray analysis of the element of the same kind as the trace element contained in the buffer layer ( 20 ) is 2% by mass or more and 99% by mass or less.

First claim

The invention claimed is:

1. A corrosion-resistant member comprising:
a metal base material;
a corrosion-resistant coating formed on a surface of the base material; and
a buffer layer formed between the base material and the corrosion-resistant coating, wherein
the base material contains a main element which is an element having a highest mass content ratio among elements contained in the base material and a trace element which is an element having a mass content ratio of 1% by mass or less,
the corrosion-resistant coating contains at least one kind selected from magnesium fluoride, aluminum fluoride, and aluminum oxide, and
the buffer layer contains an element of a same kind as the trace element, and a content ratio obtained by energy dispersive X-ray analysis of the element of the same kind as the trace element contained in the buffer layer is 2% by mass or more and 99% by mass or less,
wherein the buffer layer includes chromium, nickel, iron, and copper.

2. The corrosion-resistant member according to claim 1 , wherein the main element is aluminum.

3. The corrosion-resistant member according to claim 2 , wherein the trace element is at least one kind selected from chromium, nickel, iron, and copper.

4. The corrosion-resistant member according to claim 2 , wherein a thickness of the buffer layer is 5 nm or more and 100 nm or less.

5. The corrosion-resistant member according to claim 2 , wherein a thickness of the corrosion-resistant coating is 100 nm or more and 50000 nm or less.

6. The corrosion-resistant member according to claim 1 , wherein the trace element is at least one kind selected from chromium, nickel, iron, and copper.

7. The corrosion-resistant member according to claim 6 , wherein a thickness of the buffer layer is 5 nm or more and 100 nm or less.

8. The corrosion-resistant member according to claim 6 , wherein a thickness of the corrosion-resistant coating is 100 nm or more and 50000 nm or less.

9. The corrosion-resistant member according to claim 1 , wherein a thickness of the buffer layer is 5 nm or more and 100 nm or less.

10. The corrosion-resistant member according to claim 9 , wherein a thickness of the corrosion-resistant coating is 100 nm or more and 50000 nm or less.

11. The corrosion-resistant member according to claim 1 , wherein a thickness of the corrosion-resistant coating is 100 nm or more and 50000 nm or less.

12. The corrosion-resistant member according to claim 1 , wherein the trace element comprises chromium, nickel, iron, and copper.

Assignees

• Showa Denko Kk
• Resonac Corp

Inventors

• Miyaishi So
• Okubo Masahiro
• Yoshimura Masayuki
• Sakane Wataru
• Tanaka Teppei
• Nakamura Saeko
• Yamaki Saori

Classifications

• C23C28/345 Primary

  with at least one oxide layer · CPC title

• C23C28/32

  including at least one pure metallic layer · CPC title

• H01J37/32477

  characterised by the means for protecting vessels or internal parts, e.g. coatings · CPC title

• C23C28/321 Primary

  with at least one metal alloy layer · CPC title

• C23C28/04 Primary

  only coatings of inorganic non-metallic material · CPC title