Patent ID: 8834734
Filing Date: 2014-09-16
Classification: C23F,C25F,H01M,Y02E

Abstract:
1. A method of surface alloying stainless steel comprising: providing a stainless steel surface having an initial amount of iron and an initial amount of chromium; and preferentially removing iron from the stainless steel surface to obtain a surface having an amount of iron less than the initial amount of iron and an amount of chromium greater than the initial amount of chromium, wherein preferentially removing iron from the stainless steel surface comprises: activating the stainless steel surface with hydrochloric acid, or activating the stainless steel surface with 10-30% sulfuric acid at room temperature, or activating the stainless steel surface with 1-10% sulfuric acid at 50-80° C. for a duration of about 1-10 seconds.