Unknown corrosion rate Unknown corrosion rate Joss10 (Mechanical) (OP) 9 Dec 16 11:23 Is it right using values in Table 2 from NACE SPO775-2-2013 to assume unknown corrosion rates?? Thanks, RE: Unknown corrosion rate SJones (Petroleum) 9 Dec 16 16:33 No. Read the first sentence of 5.1.1 and note the use of the word "measured." If the rates have been measured, how can they be unknown? Perhaps the specific context of the question can be elaborated upon? Steve Jones Corrosion Management Consultant http://www.linkedin.com/pub/8/83b/b04 All answers are personal opinions only and are in no way connected with any employer.