Material and a method for forming a protective coating on a substrate of a copper-based alloy

A powdered metallic material for forming a protective coating for use against high temperature corrosion and erosion on an alloy substrate based on copper, characterized in that the powdered metallic material is selected from at least one of the group consisting of:

• ______________________________________ (1) Cu:
• 5-30 P:
• 0.1-4.0 B:
• 0.5-4.0 Si:
• 0.5-4.0 Cr:
• 0-5.0 Fe:
• 0-3.0 C:
• 0-0.3 Ni:
• substantially the balance (2) Cu:
• 8.0-20.0 P:
• 0.5-2.5 B:
• 0.8-3.0 Si:
• 1.0-3.5 Cr:
• 0-2.0 Fe:
• 0-2.0 C:
• 0-0.2 Ni:
• substantially the balance (3) Cu:
• 12.0-15 P:
• 1-2 B:
• 1.2-1.7 Si:
• 2.0-2.5 Cr:
• 0-0.5 Fe:
• 0-1.0 C:
• 0-0.1 Ni:
• substantially the balance ______________________________________
• said selected material characterized in that it is a mixture of a powdered alloy selected from the group consisting of nickel-phosphorous alloys, nickel-chromium-phosphorus alloys, and copper phosphorus alloys, with a powdered alloy selected from the group consisting of nickel-boron-silicon alloys and nickel-chromium-boron-silicon alloys.