Localized Corrosion Deterioration (CONT)

TB 9-2510-242-40

If the thickness loss is greater than 50 percent, each damaged segment/member must be replaced and reinforced by an

additional 50 percent of design thickness in the damaged area. Typical reinforcement designs are shown in figures B-1

through B-9.

(4) Repair Members/Segments As Necessary. Corroded members or segments shall first be repaired as

shown in paragraphs 5-2 through 5-4. However, the type of corrosion, overall or localized, and its extent (area and

residual material thickness) must be considered when determining whether to repair or replace the member or segment.

(5) Attach Reinforcement Parts.. Accurately position and clamp all reinforcement' parts before welding in

place. All areas to be welded shall have the old coating system removed to a distance of 4 inches either side of the new

weld location. Welds shall be made using the skip-weld procedure described in paragraph 5-1d.

(6) Treat/Paint New Weld Joint. Treat and paint the newly welded joint and/or reinforcement part areas

according to the requirements of the original member/segment.