WelcomeWelcome The objective is to provide the best The objective is to provide the best

recommendation to diminish the possibility recommendation to diminish the possibility of corrosion at the metal and insulation of corrosion at the metal and insulation interface.interface.

Explanation on the differences between Explanation on the differences between moisture retarder and vapor barrier.moisture retarder and vapor barrier.

Show the results of corrosion tests done Show the results of corrosion tests done on multiple bare metals. (Galvanic Test)on multiple bare metals. (Galvanic Test)

Show the results of corrosion tests done Show the results of corrosion tests done on multiple bare metals laminated with on multiple bare metals laminated with polysurlyn moisture retarder.polysurlyn moisture retarder.

Show the results of corrosion test done on Show the results of corrosion test done on painted moisture retarders. (Pinhole Test)painted moisture retarders. (Pinhole Test)

Introduce ITW’s recommended solution.Introduce ITW’s recommended solution.

TerminologyTerminology

Two terms often confusedTwo terms often confused

Vapor Retarder /BarrierVapor Retarder /Barrier

Moisture RetarderMoisture Retarder

Vapor Retarder/ Vapor Retarder/ BarrierBarrier

Definition- A material used to prevent Definition- A material used to prevent moisture vapor in the atmosphere from moisture vapor in the atmosphere from reaching the insulation on cold work.reaching the insulation on cold work.

System operating below ambient System operating below ambient temperature: vapor drive is toward the cold temperature: vapor drive is toward the cold pipe and equipmentpipe and equipment

Vapor barrier properly applied to warm Vapor barrier properly applied to warm side of insulation can minimize problemsside of insulation can minimize problems

Moisture RetarderMoisture Retarder

Definition- A material, usually PolysurlynDefinition- A material, usually Polysurlyn®®, , which is heat laminated to the inner which is heat laminated to the inner surface of metal jacketing to keep surface of metal jacketing to keep moisture from contacting the metal jacket moisture from contacting the metal jacket in order to prevent corrosion of the jacket.in order to prevent corrosion of the jacket.

Function is really corrosion retarder. Function is really corrosion retarder.

MOISTURE RETARDER

MoistureMoisture

Entrapped between the insulation jacket Entrapped between the insulation jacket and the insulation may function as weak and the insulation may function as weak electrolyte.electrolyte.

This condition may set up galvanic This condition may set up galvanic corrosioncorrosion

Important to keep insulation and exterior of Important to keep insulation and exterior of vapor retarder dryvapor retarder dry

Job Site ConditionsJob Site Conditions

May be difficult to insure that insulation May be difficult to insure that insulation and vapor retarder dry before applying and vapor retarder dry before applying insulation jacketinginsulation jacketing

We always recommend a PolysurlynWe always recommend a Polysurlyn®® moisture retarder. The insulation jacketing moisture retarder. The insulation jacketing may come into contact with excessive may come into contact with excessive amounts of moisture at anytime.amounts of moisture at anytime.

Standard Moisture RetardersStandard Moisture Retarders

PolysurlynPolysurlyn®® - a three layer co extruded - a three layer co extruded film film

Paint – of different typesPaint – of different types

GOALGOAL

Provide the best recommendation to Provide the best recommendation to diminish the possible interior corrosion of diminish the possible interior corrosion of insulation jacketing installed by you or insulation jacketing installed by you or your customersyour customers

Corrosion of Insulation JacketingCorrosion of Insulation Jacketing

Metal Types Metal Types

- All- All

DifferentiationDifferentiation

- Based on user specification- Based on user specification

-Job Site environment-Job Site environment

Galvanic Corrosion Galvanic Corrosion TestingTesting

Test parametersTest parameters

Materials testedMaterials tested

Test resultsTest results

Aluminum 3000 Series BareAluminum 3000 Series Bare

Corrosion on the inside of the unprotected Corrosion on the inside of the unprotected aluminum 3000 series jacket. aluminum 3000 series jacket.

Aluminum 3000 series BareAluminum 3000 series Bare

Corrosion on the inside of the unprotected Corrosion on the inside of the unprotected aluminum 3000 series jacket.aluminum 3000 series jacket.

Corrosion Pits

Galvanized Steel BareGalvanized Steel Bare

Removed from test earlyRemoved from test early

Zinc coating failedZinc coating failed

Galvanized Steel BareGalvanized Steel Bare

Corrosion on the inside of the galvanized steel Corrosion on the inside of the galvanized steel jacketjacket

Zinc/aluminum coated steelZinc/aluminum coated steel

Red corrosion on the interior of a zinc/aluminum Red corrosion on the interior of a zinc/aluminum steel jacket.steel jacket.

Aluminized SteelAluminized Steel

CorrosionCorrosion

Aluminum 3000 series w/PSMRAluminum 3000 series w/PSMR

Aluminum 3000 series H14 jacket with no Aluminum 3000 series H14 jacket with no corrosion corrosion

Zinc/aluminum coated steel Zinc/aluminum coated steel w/PSMRw/PSMR

Zinc/aluminum steel jacket with Zinc/aluminum steel jacket with PolysurlynPolysurlyn®®

ConclusionConclusion

Bare metal Bare metal

-All corrodes-All corrodes

PolysurlynPolysurlyn®®

- No evidence of corrosion- No evidence of corrosion

Pinhole TestingPinhole Testing

Test ParametersTest Parameters

Test ResultsTest Results

Typical Painted Aluminum Typical Painted Aluminum JacketingJacketing

Painted Aluminum Jacketing-Painted Aluminum Jacketing-ThermocladThermoclad®®

ThermocladThermoclad®® Plus Plus

ComparisonComparison

Pin Hole Test ResultsPin Hole Test Results

ALL paint type moisture retarders tested ALL paint type moisture retarders tested have pin holes have pin holes

ThermocladThermoclad®® Plus has no pinholes Plus has no pinholes

ConclusionConclusion

ThermocladThermoclad®® Plus offers superior interior Plus offers superior interior protectionprotection

RecommendationsRecommendations

PolysurlynPolysurlyn®® moisture retarder is moisture retarder is recommended for all types of metal recommended for all types of metal jacketing as best practicejacketing as best practice

PolysurlynPolysurlyn®® shall be 3 mil thickness, 3 shall be 3 mil thickness, 3 layer co-extruded film, factory heat layer co-extruded film, factory heat laminated to metal jacketinglaminated to metal jacketing

ITW Insulation Systems CanadaITW Insulation Systems CanadaAluminum Jacketing ProductsAluminum Jacketing Products

We will offer two Products: We will offer two Products:

GOODGOODAluminum with Polysurlyn Moisture Aluminum with Polysurlyn Moisture

Retarder.Retarder.Exterior: Bare AluminumExterior: Bare AluminumInterior: 3 mil thickness 3 layer co-Interior: 3 mil thickness 3 layer co-

extruded Polysurlyn factory heat laminated extruded Polysurlyn factory heat laminated to metal jacketing.to metal jacketing.

BESTBEST

THERMOCLAD PLUS THERMOCLAD PLUS ®®

Exterior: 0.4 mil clear un-tinted coil coated Exterior: 0.4 mil clear un-tinted coil coated thermosetting enamel.thermosetting enamel.

Interior: 0.6 mil laminate grade coil coated Interior: 0.6 mil laminate grade coil coated thermosetting enamel covered by a 3 mil thermosetting enamel covered by a 3 mil thickness 3 layer co-extruded polysurlyn thickness 3 layer co-extruded polysurlyn factory heat laminated over the enamel factory heat laminated over the enamel undercoat.undercoat.

FOR SPECIFICATION DATA SHEETS PLEASE VISITFOR SPECIFICATION DATA SHEETS PLEASE VISIT

OUR WEBSITE AT WWW.ITWINSULATION.CAOUR WEBSITE AT WWW.ITWINSULATION.CA