Enhanced corrosion resistant amorphous metal alloy coatings

• US 4,810,314 A
• Filed: 12/28/1987
• Issued: 03/07/1989
• Est. Priority Date: 12/28/1987
• Status: Expired due to Term

• Current Assignee: Standard Oil Company (BP PLC)
• Original Assignee: Standard Oil Company (BP PLC)
• Inventors: Shreve, Gary A., Henderson, Richard S., Tenhover, Michael A.
• Primary Examiner(s): DEAN, RICHARD
• Application Number:
  US07/138,789
• Time in Patent Office: 435 Days
• Field of Search: 148/403, 148/423, 420/428
• US Class Current: 148/403
• CPC Class Codes: C22C 45/006 with Cr as the major constituent
• CPC Class Codes: C23C 30/00 Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process C23C26/00, C23C28/00 take precedence

Abstract

The present invention relates to an amorphous metal alloys of the formula:

Cr.sub.a X.sub.b M.sub.c

wherein

X is at least one element selected from the group consisting of Pt, Pd, Ir, Rh and Ru;

M is at least one element selected from the group consisting of P, B, N, C, As, Sb and S; and wherein a ranges from about 0.60 to abotu 0.96;

b ranges from greater than zero to about 0.01;

c ranges from about 0.04 to about 0.40; and with the provisor that a+b+c equals 1.00.

Claims

1. An amorphous metal alloy of the formula is:

space="preserve" listing-type="equation">Cr.sub.a X.sub.b M.sub.c

wherein

X is at least one element selected from the group consisting of;

Pt, Pd, Ir, Rh and Ru;

M is at least one element selected from the group consisting of P, B, N, C, As, Sb and S;

and wherein

a ranges from about 0.69 to about 0.96;

b ranges from greater than zero to about 0.01;

c ranges from about 0.04 to about 0.40;

and with the proviso that a+b+c equals 1.00.

2. The amorphous metal alloy in accordance with claim 1 wherein said amorphous metal alloy is at least 50 percent amorphous.

3. The amorphous metal alloy in accordance with claim 1 wherein said amorphous metal alloy is at least 80 percent amorphous.

4. The amorphous metal alloy in accordance with claim 1 wherein said amorphous metal alloy is about 100 percent amorphous.

5. The amorphous metal alloy in accordance with claim 1 wherein said amorphous metal alloy is resistant to a strongly oxidizing corrosive environment.

6. The amorphous metal alloy in accordance with claim 1 wherein said amorphous metal alloy is resistant to a strongly reducing corrosive environment.

7. An amorphous metal alloy coating of the formula:

space="preserve" listing-type="equation">Cr.sub.a X.sub.b M.sub.c

wherein

X is at least one element selected from the group consisting of

Pt, Pd, Ir, Rh and Ru;

wherein

M is at least one element selected from the group consisting of P, B, N, C, As, Sb and S;

and wherein

a ranges from about 0.69 to 0.96;

b ranges from greater than zero to about 0.01;

c ranges from about 0.04 to about 0.40;

and with the proviso that a+b+c equals 1.00, formed by a process comprising depositing a film of said amorphous metal alloy on a substrate.