You can etch electrochemically in sulphuric acid under positive bias far
from from the corrosion potential roughly + 1.2 V from its corrosion
potential. Good luck! Ramesham

At 10:06 AM 10/12/98 -0700, you wrote:
>Hi!
>I am wondering if someone has some information about stainless steel
>etchants, or vendors. We are going to etch 200 um thick stainless steel.
>The stainless steel has some of Cr and Ni. We tried some etchants
>followed by a Metal Handbook. But the etch rate is not fast enough.
>I heard ferric chloride can etch the stainless steel. But I don't have
>the information about the concentration. If you give us some information,
>We will really appreciate that.
>
>Sang-Wook
>
>