On 2/23/2010 1:09 PM, Chemo the Clown wrote:
> On Feb 23, 9:32 am, wrote:
>> On Tue, 23 Feb 2010 09:06:14 -0800 (PST), Chemo the Clown
>>
>>
>>
>> > wrote:
>>> On Feb 23, 8:39 am, > wrote:
>>>> As part of a remodeling project, I installed a brand new stainless
>>>> steel sink a few weeks ago. The model number is Kohler K-3145,
>>>> Cadence, Self-Rimming Kitchen Sink.http://www.us.kohler.com/onlinecatal...rod_num=3145-4
>>
>>>> With my old sink, we used to keep a bottle of liquid hand soap on the
>>>> rim of the sink. We did that for about 30 years with no problems. With
>>>> the new sink I happened to notice a stain on the sink in the shape of
>>>> the bottom of the bottle about a week or two after I installed the
>>>> sink. Hard scrubbing with dish soap won't remove it and neither will
>>>> some other stuff I bought called "Stainless Steel Magic". Looking on
>>>> the plus side, though, it is hardly noticeable. So, I suppose I can
>>>> live with it.
>>
>>>> So, what's the deal with this stainless steel sink staining so easily?
>>>> I wonder what else I have to worry about with this new sink?
>>
>>> There are several grades of stainless. Stainless can stain but not
>>> rust.
>>
>> You are correct that there are lots of variations that are
>> collectively called Stainless Steel. You are incorrect about it not
>> suffering from corrosion. Even the marine grades of stainless can and
>> do corrode, and sometimes quickly and severely. Stainless Steel loses
>> it's anti-corrosion abilities if deprived of oxygen.
>
> Well...I guess I'm glad that my stainless sink isn't in an oxygen
> deprived state. I have a sailboat with lots of stainless rigging...30
> years old and it still looks as good today as the day I bought it. But
> then it's got a lot of oxygen around.

You might be surprised--swaged fittings for example can corrode
internally. You don't see the corrosion until the fitting comes apart.