Presentation on theme: "Welcome The objective is to provide the best recommendation to diminish the possibility of corrosion at the metal and insulation interface. Explanation."— Presentation transcript:
2 WelcomeThe objective is to provide the best recommendation to diminish the possibility of corrosion at the metal and insulation interface.Explanation on the differences between moisture retarder and vapor barrier.
3 Show the results of corrosion tests done on multiple bare metals Show the results of corrosion tests done on multiple bare metals. (Galvanic Test)Show the results of corrosion tests done on multiple bare metals laminated with polysurlyn moisture retarder.Show the results of corrosion test done on painted moisture retarders. (Pinhole Test)Introduce ITW’s recommended solution.
4 Terminology Two terms often confused Vapor Retarder /Barrier Moisture Retarder
5 Vapor Retarder/ Barrier Definition- A material used to prevent moisture vapor in the atmosphere from reaching the insulation on cold work.System operating below ambient temperature: vapor drive is toward the cold pipe and equipmentVapor barrier properly applied to warm side of insulation can minimize problems
7 Moisture RetarderDefinition- A material, usually Polysurlyn®, which is heat laminated to the inner surface of metal jacketing to keep moisture from contacting the metal jacket in order to prevent corrosion of the jacket.Function is really corrosion retarder.
9 MoistureEntrapped between the insulation jacket and the insulation may function as weak electrolyte.This condition may set up galvanic corrosionImportant to keep insulation and exterior of vapor retarder dry
10 Job Site ConditionsMay be difficult to insure that insulation and vapor retarder dry before applying insulation jacketingWe always recommend a Polysurlyn® moisture retarder. The insulation jacketing may come into contact with excessive amounts of moisture at anytime.
11 Standard Moisture Retarders Polysurlyn® - a three layer co extruded filmPaint – of different types
12 GOALProvide the best recommendation to diminish the possible interior corrosion of insulation jacketing installed by you or your customers
13 Corrosion of Insulation Jacketing Metal Types- AllDifferentiation- Based on user specification-Job Site environment
14 Galvanic Corrosion Testing Test parametersMaterials testedTest results
15 Aluminum 3000 Series BareCorrosion on the inside of the unprotected aluminum 3000 series jacket.
16 Aluminum 3000 series BareCorrosion PitsCorrosion on the inside of the unprotected aluminum 3000 series jacket.
17 Galvanized Steel BareRemoved from test earlyZinc coating failed
18 Galvanized Steel BareCorrosion on the inside of the galvanized steel jacket
19 Zinc/aluminum coated steel Red corrosion on the interior of a zinc/aluminum steel jacket.
21 Aluminum 3000 series w/PSMR Aluminum 3000 series H14 jacket with no corrosion
22 Zinc/aluminum coated steel w/PSMR Figure depicts a galvalume steel jacket with a polysurlyn moisture retarder. This material also performed extremely well during the test. The polysurlyn protected the galvalume, which is dramatic when comparing photo to photo. The polysurlyn moisture barrier on the gavlalume steel was stained, but a thorough inspection revealed that it remained intact and unaffected by the test.Zinc/aluminum steel jacket with Polysurlyn®
23 Conclusion Bare metal -All corrodes Polysurlyn® - No evidence of corrosion
29 Pin Hole Test ResultsALL paint type moisture retarders tested have pin holesThermoclad® Plus has no pinholes
30 ConclusionThermoclad® Plus offers superior interior protection
31 RecommendationsPolysurlyn® moisture retarder is recommended for all types of metal jacketing as best practicePolysurlyn® shall be 3 mil thickness, 3 layer co-extruded film, factory heat laminated to metal jacketing
32 ITW Insulation Systems Canada Aluminum Jacketing Products We will offer two Products:GOODAluminum with Polysurlyn Moisture Retarder.Exterior: Bare AluminumInterior: 3 mil thickness 3 layer co-extruded Polysurlyn factory heat laminated to metal jacketing.
33 Exterior: 0.4 mil clear un-tinted coil coated thermosetting enamel. BESTTHERMOCLAD PLUS ®Exterior: 0.4 mil clear un-tinted coil coated thermosetting enamel.Interior: 0.6 mil laminate grade coil coated thermosetting enamel covered by a 3 mil thickness 3 layer co-extruded polysurlyn factory heat laminated over the enamel undercoat.FOR SPECIFICATION DATA SHEETS PLEASE VISITOUR WEBSITE AT