Diffusion Surface Alloyed Metal Exhaust Component

An exhaust component for a motor vehicle, comprising:

• a housing including at least one outer wall defining an internal volume of said housing;
• said at least one outer wall having an inside surface facing said internal volume of said housing and an outside surface facing an external zone positioned outside of said housing;
• at least one inner wall positioned in said internal volume of said housing that defines an exhaust chamber within said internal volume;
• and
• at least part of one of said outer or inner walls being made of a diffusion surface alloyed metal sheet comprising a secondary metal that is formed to a primary metal substrate by diffusion,
• wherein said primary metal substrate is stainless steel and has a primary metal chromium content of at least 10 percent chromium and said secondary metal has a secondary metal chromium content that is greater than said primary metal chromium content.

An exhaust component for a motor vehicle, comprising:

• a housing including at least one outer wall defining an internal volume of said housing;
• said at least one outer wall having an inside surface facing said internal volume of said housing and an outside surface facing an external zone positioned outside of said housing;
• at least one inner wall positioned in said internal volume of said housing that defines an exhaust chamber within said internal volume;
• and
• at least part of said outer wall and at least part of said inner wall being made of one or more diffusion surface alloyed metal sheets each comprising a secondary metal that is formed to a primary metal substrate by diffusion.