CREVICE CORROSION FACTOR
CREVICE CORROSION FACTOR
(OP)
Our costumer want a pump with metallurgies which have:
A PREN sup 38 and a crevice corrosion factor sup 35.
I don't know what is the CF factor.
Could you help me?
Thank you for your answers.





RE: CREVICE CORROSION FACTOR
The only way to find out your CCCT is to test actual samples.
I would suggest that you might want to recommend that you be allowed to use Critical Pitting Temperature instead. The test is much easier becuase it requires far less sample preperation.
I may have missunderstood your question.
Are you talking about a Critial Crevice Temperature???
There is no alloy with a PREN of 38 that will have a CCCT of 35C. To have that level of CCCT you will have a PREN well over 45. (depending on which PREN formula you are using).
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Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm
RE: CREVICE CORROSION FACTOR
Which factor for nitrogen do you use in the PREN equation?
16 or 30 or something else?
RE: CREVICE CORROSION FACTOR
The CPT and CCCT estimates using the equations in ASTM G48 are fairly accurate also.
= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm