APPENDIX A (continued)
Soil Samples and Water Samples (Steam Riser, etc.). Take samples for
sulfides and sulfate (and pH) at representative grid locations
(minimum of six).
Stray Currents. Using two copper sulfate cells, take soil potential
profile readings in a rosette pattern as necessary.
Work to Accomplish:
Contact corrosion or maintenance engineers of operators in the area,
Oil transmission pipelines.
Gas transmission pipelines.
Gas distribution company.
Electrical power company.
Manufacturing plants in the area.
Corrosion Coordinating Committee.
Railroad (Do nearby railroads have signal system? Electrical
propulsion - ac or dc?).
Data or Information to Get From Corrosion or Maintenance Engineers:
Failure and corrosion experience.
Is cathodic protection being used? Type? Rectifier locations?
Personnel to contact for coordination tests - names, addresses,
and telephone numbers.
Place and time of Coordinating Committee meeting.
Is stray current a problem? Its source? What structures have been
Are deicing salts used in streets?
Are underground structures coated? Which ones? Type coating?
Get drawings and other location information on all structures in
the area. Mark those protected and locations of rectifiers.