Method of preventing corrosion of a material against hydrochloric acid

• US 4,968,363 A
• Filed: 11/22/1988
• Issued: 11/06/1990
• Est. Priority Date: 08/06/1985
• Status: Expired due to Fees

• Current Assignee: Koji Hashimoto, Mitsui Engineering & Shipbuilding Company Limited (Mitsui E&S Holdings Co., Ltd.)
• Original Assignee: Koji Hashimoto, Mitsui Engineering & Shipbuilding Company Limited (Mitsui E&S Holdings Co., Ltd.)
• Inventors: Hashimoto, Koji, Shimamura, Kazuo, Kawashima, Asahi, Asami, Katsuhiko
• Primary Examiner(s): Dean, R.
• Application Number:
  US07/275,642
• Time in Patent Office: 714 Days
• Field of Search: 148/403, 148/320, 148/325, 148/327, 148/333, 148/336, 148/337, 148/421, 148/422, 148/423, 148/425-427, 148/442
• US Class Current: 148/403
• CPC Class Codes: C22C 45/04 with nickel or cobalt as the major constituent
• CPC Class Codes: C22C 45/10 with molybdenum, tungsten, niobium, tantalum, titanium, or zirconium or Hf as the major constituent

Abstract

A highly corrosion-resistant amorphous alloy composed of ni-- 15-80 atomic % Ta Ni-- 30-80 atomic % Ta, or Ni-- 20-50 atomic % Ta-- 10-23 atomic % P, with a specific amount of optional elements of Ti, Zr, Nb, W, Fe, Co, Cr, P, B, Si, or C.

Claims

1. A method of preventing corrosion of a material against hot concentrated hydrochloric acids, comprising:

preparing an amorphous alloy consisting essentially of 30-80 atomic % of Ta, with the balance being substantially Ni, and

contacting the amorphous alloy to the hot concentrated hydrochloric acids, said amorphous alloy forming a passive film in the acids to prevent corrosion.

2. A method according to claim 1, wherein said amorphous alloy is formed by sputter deposition.

3. A method according to claim 1, wherein said amorphous alloy further includes at least one of Fe and Co, Ni being 2 atomic % or more with the balance being substantially at least one of Fe and Co.

4. A method of preventing corrosion of a material against hot concentrated hydrochloric acids, comprising:

preparing an amorphous alloy consisting essentially of 7 atomic % or more of Ta, at least one of Nb, Ti, Zr and Cr in the amount up to 80 atomic % together with Ta, and Ni, and

contacting the amorphous alloy to the hot concentrated hydrochloric acids, said amorphous alloy forming a passive film in the acids to prevent corrosion.

5. A method according to claim 4, wherein Ta is 12 atomic % or more, Nb being 30 to 80 atomic % together with Ta and the balance being substantially Ni.

6. A method according to claim 4, wherein Ta is 25 atomic % or more, at least one element selected from the group consisting of Ti, Zr and Cr being 30 to 80 atomic % together with Ta and the balance being substantially Ni.

7. A method according to claim 4, wherein Ta is 12 atomic % or more, Nb being 25 atomic % or more together with Ta, at least one element selected from the group consisting of Ti, Zr and Cr being 30 to 80 atomic % together with Ta and Nb, and the balance being substantially Ni.

8. A method according to claim 4, wherein said amorphous alloy further comprises at least one of Fe and Co, Ni being 2 atomic % or more with the balance being substantially at least one of Fe and Co.

9. A method according to claim 8, wherein Ta is 12 atomic % or more, Nb being 30 to 80 atomic % together with Ta.

10. A method according to claim 8, wherein Ta is 25 atomic % or more, at least one element selected from the group consisting of Ti, Zr and Cr being 30 to 80 atomic % together Ta.

11. A method according to claim 8, wherein Ta is 12 atomic % or more, Nb being 25 atomic % or more together with Ta, and at least one element selected from the group consisting of Ti, Zr and Cr being 30 to 80 atomic % together with Ta and Nb.

12. A method according to claim 4, wherein said amorphous alloy further includes P in the amount of 7 atomic % or less.

13. A method according to claim 12, wherein Ta is 7 atomic % or more, Nb being 20 to 80 atomic % together with Ta, and the balance being substantially 20 atomic % or more of Ni.

14. A method according to claim 12, wherein Ta is 15 atomic % or more, at least one element selected from the group consisting of Ti, Zr and Cr being 20 to 80 atomic % together with Ta, and the balance being substantially 20 atomic % or more of Ni.

15. A method according to claim 12, wherein Ta is 7 atomic % or more, Nb being 16 atomic % or more together with Ta, at least one element selected from the group consisting of Ti, Zr and Cr being 20 to 80 atomic % together with Ta and Nb, and the balance being substantially 20 atomic % or more of Ni.

16. A method according to claim 12, wherein said amorphous alloy further includes at least one of Fe and Co which is substantially the balance and is 20 atomic % or more together with Ni, and Ni being 2 atomic % or more.

17. A method according to claim 16, wherein Ta is 7 atomic % or more, and Nb being 20 to 80 atomic % together with Ta.

18. A method according to claim 16, wherein Ta is 15 atomic % or more, and at least one element selected from the group consisting of Ti, Zr and Cr being 20 to 80 atomic % together with Ta.

19. A method according to claim 16, wherein Ta is 7 atomic % or more, Nb being 16 atomic % or more together with Ta, and at least one element selected from the group consisting of Ti, Zr and Cr being 20 to 80 atomic % together with Ta and Nb.

20. A method of preventing corrosion of a material against hot concentrated hydrochloric acids, comprising:

preparing an amorphous alloy consisting essentially of 20 to 80 atomic % of Ta, 7 atomic % or less of P, and Ni, and

contacting the amorphous alloy to the hot concentrated hydrochloric acids, said amorphous alloy forming a passive film in the acids to prevent corrosion.

21. A method according to claim 20, wherein said amorphous alloy further includes at least one of Fe and Co which is substantially the balance and is 20 atomic % or more together with Ni, and Ni being 2 atomic % or more.

22. A method of preventing corrosion of a material against hot concentrated hydrochloric acids, comprising:

preparing an amorphous alloy consisting essentially of 20 to 50 atomic % of Ta, and 10 to 23 atomic % of P with the balance being substantially Ni, and

contacting the amorphous alloy to the hot concentrated hydrochloric acids, said amorphous alloy forming a passive film in the acids to prevent corrosion.

23. A method according to claim 22, wherein said amorphous alloy further includes at least one of Fe and Co, Ni being 2 atomic % or more with the balance being substantially at least one of Fe and Co.

24. A method of preventing corrosion of a material against hot concentrated hydrochloric acids, comprising:

preparing an amorphous alloy consisting essentially of 7 atomic % or more of Ta, at least one of Nb, Ti, Zr and Cr in the amount up to 50 atomic % together with Ta, 10 to 23 atomic % of P, and Ni, and

contacting the amorphous alloy to the hot concentrated hydrochloric acids, said amorphous alloy forming a passive film in the acids to prevent corrosion.

25. A method according to claim 24, wherein Ta is 7 atomic % or more, Nb being 20 to 50 atomic % together with Ta and the balance being substantially Ni.

26. A method according to claim 24, wherein Ta is 15 atomic % or more, at least one element selected from the group consisting of Ti, Zr and Cr being 20 to 50 atomic % together with Ta and the balance being substantially Ni.

27. A method according to claim 24, wherein Ta is 8 atomic % or more, Nb being 16 atomic % or more together with Ta, at least one element selected from the group consisting of Ti, Zr and Cr being 20 to 50 atomic % together with Ta and Nb, and the balance being substantially Ni.

28. A method according to claim 24, wherein said amorphous alloy further includes at least one of Fe and Co, Ni being 2 atomic % or more with the balance being substantially at least one of Fe and Co.

29. A method according to claim 28, wherein Ta is 7 atomic % or more, and Nb being 20 to 50 atomic % together with Ta.

30. A method according to claim 28, wherein Ta is 15 atomic % or more, and at least one element selected from the group consisting of Ti, Zr and Cr being 20 to 50 atomic % together with Ta.

31. A method according to claim 28, wherein Ta is 8 atomic % or more, Nb being 16 atomic % or more together with Ta, and at least one element selected from the group consisting of Ti, Zr and Cr being 20 to 50 atomic % together with Ta and Nb.

32. A method of preventing corrosion of a material against hot concentrated hydrochloric acids, comprising:

preparing an amorphous alloy consisting essentially of 7 atomic % or more of Ta, at least one of Nb, Ti, Zr and Cr in the amount up to 50 atomic % together with Ta, 0.05 atomic % or more of P, at least one of B, Si and C in the amount of 10 to 23 atomic % together with P, and Ni, and

contacting the amorphous alloy to the hot concentrated hydrochloric acids, said amorphous alloy forming a passive film in the acids to prevent corrosion.

33. A method according to claim 32, wherein Ta is 7 atomic % or more, Nb being 20 to 50 atomic % together with Ta, with the balance being substantially Ni.

34. A method according to claim 32, wherein Ta is 15 atomic % or more, at least one element selected from the group consisting of Ti, Zr and Cr being 20 to 50 atomic % together with Ta, with the balance being substantially Ni.

35. A method according to claim 32, wherein Ta is 8 atomic % or more, Nb being 16 atomic % or more together with Ta, at least one element selected from the group consisting of Ti, Zr and Cr being 20 to 50 atomic % together with Ta and Nb, with the balance being substantially Ni.

36. A method according to claim 32, wherein said amorphous alloy further includes at least one of Fe and Co, Ni being 2 atomic % or more with the balance being substantially at least one of Fe and Co.

37. A method according to claim 36, wherein Ta is 7 atomic % or more, and Nb being 20 to 50 atomic % together with Ta.

38. A method according to claim 36, wherein Ta is 15 atomic % or more, and at least one element selected from the group consisting of Ti, Zr and Cr being 20 to 50 atomic % together with Ta.

39. A method according to claim 36, wherein Ta is 8 atomic % or more, Nb being 16 atomic % or more together with Ta, and at least one element selected from the group consisting of Ti, Zr and Cr being 20 to 50 atomic % together with Ta and Nb.

40. A method of preventing corrosion of a material against hot concentrated hydrochloric acids, comprising:

preparing an amorphous alloy consisting essentially of 20 to 50 atomic % of Ta, 0.05 atomic % or more of P, at least one of B, Si and C in the amount of 10 to 23 atomic % together with P, and Ni, and

contacting the amorphous alloy to the hot concentrated hydrochloric acids, said amorphous alloy forming a passive film in the acids to prevent corrosion.

41. A method according to claim 40, wherein said amorphous alloy further includes at least one of Fe and Co, Ni being 2 atomic % or more with the balance being substantially at least one of Fe and Co.