Wrong Corrosion Test Method for 420SS Knife Blades?
Wrong Corrosion Test Method for 420SS Knife Blades?
(OP)
Wrong Corrosion Test Method for 420SS Knife Blades?
We send cutlery set samples ( kitchen knives ) to a testing for corrosion testing, but it failed. The knife blade is made of 420 stainless steel with heat treatment. The testing service uses salt water spray chamber to do the corrosion testing for 24 hours; big percentage of rust and pitting appear on knife blades after testing. I think salt water spray chamber is not the right corrosion testing method for cutlery knife blade, since the knife blade is made of 420 stainless steel which is higher carbon content with less corrosion resistance. What is the right method to do corrosion test for knife blade ? Where can I find the correct test method ? please advise.
Thanks for the help.
Andy
andylin@wingar.com
We send cutlery set samples ( kitchen knives ) to a testing for corrosion testing, but it failed. The knife blade is made of 420 stainless steel with heat treatment. The testing service uses salt water spray chamber to do the corrosion testing for 24 hours; big percentage of rust and pitting appear on knife blades after testing. I think salt water spray chamber is not the right corrosion testing method for cutlery knife blade, since the knife blade is made of 420 stainless steel which is higher carbon content with less corrosion resistance. What is the right method to do corrosion test for knife blade ? Where can I find the correct test method ? please advise.
Thanks for the help.
Andy
andylin@wingar.com





RE: Wrong Corrosion Test Method for 420SS Knife Blades?
A good source of information might be Consumer Reports magazine, they test everything else.
There was also some tests that 420 SS scalpels had to pass, but if I remember correctly it was autoclave and detergent/sanitizer compatibility.
I'll look around and see if I have any info left.
RE: Wrong Corrosion Test Method for 420SS Knife Blades?
The corrosion person I know best is Margaret Ziomek-Moroz moroz@alrc.doe.gov
Her work is very good - not sure if this is her area but she could refer you on.
Tom
RE: Wrong Corrosion Test Method for 420SS Knife Blades?
Since these are cutlery knives, I would use the following web site for information. The NSF (National Sanitary Foundation) will provide corrosion testing guidance to qualify your material for use. Their seal of approval is as good as gold in food service.
http://www.nsf.org/
RE: Wrong Corrosion Test Method for 420SS Knife Blades?
RE: Wrong Corrosion Test Method for 420SS Knife Blades?
RE: Wrong Corrosion Test Method for 420SS Knife Blades?