What corrodes stainless steel?

[Rapido925M]

My friends new MH (reg 01/03/24) now has what looks like corrosion in the stainless steel sink. Any suggestions as to how this could happen please?
TIA - Gordon
Please try to ignore the bubbles of detergent

 

[oilrag]

Thats been damaged by acid ..................probably .

 

[funflair]

It depends on the grade of Stainless, and what is attacking it, but if it has had normal sink stuff down it shouldn’t corrode.

 

[Derbyshire wanderer]

Bleach can easily do that to stainless steel

 

[Figaro]

Poor quality stainless steel I'd say, assuming it's only had domestic products on it.

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[Ridgeway]

Well it looks like it’s hard a hard life

Unless mistaken looks like a decent ding.

As for corrosion, SS sinks should be resistant to pretty much anything that’s sensibly been put in it. So it’s it’s either material defect or someone’s being doing something very naughty in their MoHo. Hydrochloric would have that effect, I use it fairly often so have experience with it but even then I’d think it would need leaving on the surface for a while and not just a fast rinse through.

 

[Dickyb]

Stainless steel has many many different grades, that’s obviously a low grade, try a magnet to determine the iron content, higher grade stainless has an austenitic crystal structure and isn’t magnetic

 

[Nanniemate]

Looks like a fault time to email photos and ask for a replacement me thinks

 

[Brains]

It's eating through the hull!

 

[Lenny HB]

Chlorine will damage stainless saw a photo a few years ago of a Motorhome sink with a big hole in it. A bottle Milton had got knocked over in it and left overnight.

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[carolyn]

I remember having one of those plastic containers with crystals in it that were supposed to absorb water over winter. I’d leave it in the sink in previous van. A few granules spilled from one and left sink pockmarked. Never done it again.

 

[Jimbohorlicks]

My friends new MH (reg 01/03/24) now has what looks like corrosion in the stainless steel sink. Any suggestions as to how this could happen please?
TIA - Gordon
Please try to ignore the bubbles of detergent
View attachment 898088

Probably made in China from scrap "stainless steel". Which will be full of impurities. We once had a Top quality Shefield SSteel Viners cutlery set that went rusty in odd spots. We complained they had them back and just repollished them. They went rusty again a few months later
Turns out there was a town in China named Sheffield and thats where they came from under the viners licence.

 

[Figaro]

Probably named especially for the purpose of deceipt

 

[Brains]

Probably named especially for the purpose of deceit

Sheffield is now going to be renamed Shanghai, just they can export the lower quality stuff made in the UK to China !

 

[pelican]

The truth is in the name "Stainless steel" It just corrodes less.

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[Rapido925M]

It’s had nothing on it! It’s only been used once from new because the water pipes disconnected themselves after 20 miles of driving! It was returned to the dealership who fixed the problem and then driven 300 miles to home. Since then it has stood on the driveway apart from two “days out” when the sink wasn’t used.

We were getting it ready for two weekends away and I was appalled to discover this. I couldn’t imagine what caused it BUT I will be looking to get it repaired ASAP.

Thanks for confirming my suspicions that it is probably poor quality material.

Gordon

 

[Gaston aires]

My wife’s withering look like when I’ve been naughty

 

[meanders]

Bleach certainly will do it if not rinsed off properly even with a reasonably good quality stainless. All steel contains iron, and with the wrong treatment those iron molecules will react with an agent and oxidise. It will travel much slower through better quality material, but you can bring out a reddish bloom on almost anything.