That sounds like WitchNox. It is a bit expensive but it goes a long way.

Doug
s/v Callista

"Steve" wrote in message
...
I use a weak solution of nitric acid to passivate stainless. (I don't
remember, off hand what the mix is. I just keep about 5 gals mixed in a
plastic drum and hang the part in it for a few hours.)

A welder friend has a jelly solution that has nitric acid in it. He
brushes
it on a finished stainless weld and lets it set for a couple hours then
rinse it off. Really cleans the weld effected area and never seems to rust
afterwards. Very expensive (about 15 bucks for a half pint jar.)

--
My opinion and experience. FWIW

Steve
s/v Good Intentions

Citric acid 910%) works as well as nitric and is much safer - see -
http://www.finishing.com/0800-0999/909.html


On Thu, 25 Sep 2003 09:53:52 -0700, "Steve" wrote:

I use a weak solution of nitric acid to passivate stainless. (I don't
remember, off hand what the mix is. I just keep about 5 gals mixed in a
plastic drum and hang the part in it for a few hours.)

A welder friend has a jelly solution that has nitric acid in it. He brushes
it on a finished stainless weld and lets it set for a couple hours then
rinse it off. Really cleans the weld effected area and never seems to rust
afterwards. Very expensive (about 15 bucks for a half pint jar.)

"On and Off" is what I use. Put it on with a cheap brush and hose it off. You
can buy muriatic acid a lot cheaper - works almost as well...

John

ss does not like hcl acid destorys passivation - use ospho or mild rubing
compound - "on-Off will cause future buildup faster - always use high grade
wax to protect and clean often - remember it is stainless not no stain steel
"Truelove39" wrote in message
...
"On and Off" is what I use. Put it on with a cheap brush and hose it off.
You
can buy muriatic acid a lot cheaper - works almost as well...

John

Funny, but my passivated SS (chainplates) don't rust...only handrails, etc.

John

ss does not like hcl acid destorys passivation -