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SEP.29.2008 12:16 9702233191 <br />#3579 P.007 /010 <br />Monthly Assessment Form <br />Stress corrosion. <br />To provide a consistent approach for the assessments, Interpretations are provided for the three <br />categories of corrosion. Even though these interpretations were developed for consistency, <br />they should not limit personnel from using more conservative interpretations of the type of <br />corrosion that might be observed. <br />Surface Rust <br />As depicted in Figure 2, surface rust is characterized by a rust-colored patch with a relatively <br />even surface (i.e., no deep or severe pits or crevices). <br />Figure 2 - Example of Surface Rust <br />if surface rust is visible through paint or has displaced paint and is larger than the fiat side of a <br />dime, as depicted in Figure'3, the surface rust should be identified on the assessment form. <br />Figure 3 - Visual Depiction of the Dime Comparison for Surface Rust <br />Pak a <br />Pitting is localized corrosion that results in pits or crevices in the steel. Rust that results In <br />pitting deeper than the thickness of a dime, as depicted In Figure 4, should be identified on the <br />assessment form. <br />Received Time Sep.29. 2008 12:15PM No-0329