Introduction

In February 2000, NACE Work Group T-10A-3b sent questionnaires to 49 CP practitioners and users regarding the use of the 100 mV cathodic polarization criterion.3 In this report, a summary of the 14 responses to this questionnaire is included as Appendix A. The number of companies employing the 100 mV cathodic polarization criterion increased 300% in the 10 years prior to the questionnaire. While most report using this criterion for only a small percentage of their systems (11% on average), the trend toward more widespread use is clearly established when it offers advantages to users. As usage of this criterion has increased, however, so have questions pertaining to its validity and applicability. This report is intended to address these concerns on both a theoretical and empirical basis.