Process for forming a chromium diffusion portion and articles made therefrom

A method for forming an article with a diffusion portion, comprising:

• forming a slurry comprising
• greater than or equal to about 55 wt % chromium;
• less than or equal to about 10 wt % silicon;
• about 10 wt % to about 30 wt % activator;
• about 10 wt % to about 35 wt % carrier;
• and
• wherein the weight percentages are based upon a total weight of the slurry;
• applying the slurry to the article;
• and
• heating the article to a sufficient temperature and for a sufficient period of time to diffuse chromium and silicon into the article and form a diffusion portion comprising silicon and a microstructure comprising α-chromium;
• wherein the article has an initial thickness;
• wherein the diffusion portion has a surface;
• and
• wherein a 25% depth of the diffusion portion, as measured from the surface comprises a chromium concentration of greater than or equal to 50 wt %, based upon a total weight of the 25% depth.