Devcon Maintenance and Repair Solutions - Sintemar

Field Application Reports
Products:
Application Date:
Application Customer: Date:
Customer: Industry:
Industry:
Location 59
Exchanger Tube Sheet
Repair
Retaining Compound / Ceramic Repair /
Brushable Ceramic White (Food Grade)
12/12/94
Siftco Canada Incorporated
Agriculture Salt Manufacturing
Problem:
Galvanic corrosion between the tubes and tube sheet resulted in leaking and decreased productivity.
Galvanic corrosion was caused by the combination of CuNi tubes, mild steel tube sheet, and a brine
solution. Past repair procedure was to seal leaks by welding.
Solution:
Repair surface was sandblasted to a SSPC-SP5 white metal finish. Because Chlorides were present,
therefore a pressure washing and second sandblasting was required. Complete repair area was then
chemically cleaned using Cleaner Blend 300. Voids between the tube and tube sheet less than .016” were
filled using Devcon’s Retaining Compound. All remaining gaps larger in size, were filled using Ceramic
Repair Putty. Ceramic Repair Putty was allowed to partially cure for 4 hours. Brushable Ceramic White,
(Food Grade), was mixed and transferred into caulking gun for ease in dispensing. Brushable Ceramic was
dispensed and brush applied to a thickness of 30 mils. Brushable Ceramic encapsulated the repair areas
and provided a corrosion resistant, low co-efficient to friction protective surface coating. Devcon’s repair
extended service life of this exchanger and improved salt production by 2 tons daily.