1 Durable Structures LNEC - Metalic Protection [Modo de...

DURABLE STRUCTURESLNEC Lisbon 31 May - 1June 2012

Metalic Strutures - Protection


Corrosion Protection of Stell by protective paint system

- Composed by inibitors corrosion on composition – primer and intermediate

- Impermeability capacity to water and gases ingress of intermediate and end coat (CO2, SO2, H2S,…)

- Chemical resistance of intermediate and end coat of system

- UV resistance of end coat

ICDS12 International Conference DURABLE STRUCTURES: from construction to rehabilitation LNEC • Lisbon • Portugal • 31 May - 1 June 2012

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Categories of Corrosivity “Atmosferic Exposition”

Sika Products cover the full spectrum of catagories of corrosivity difined on NP EN ISO 12944- Part 2 and all levels of durability .

Categories.pdf


Durability Protection

According NP EN ISO 12944-Part 1Durability as difined ;

• low (L = low) 2 – 5 years

• medium (M = medium) 5 – 15 years

• high (H = high) > 15 years


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Important applications.

• 1- Priming and intermediate coating in shop, final coating on site..

Table 1.pdf

• Full coating application in shop. Table 2.pdf


Important applications.

• Coating of galvanized steel.

Table 3.pdf

• 4- Refurbishment of old coatings. Table 4.pdf


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Hydraulic Steel Structures Hydraulic Steel Structures


Hydraulic Steel Structures, solutionsHydraulic Steel Structures, solutions

banned in European countriesDirective “REACH”

Tested for Im 1,2,3Replace Poxitar (83% volume sólids)2-3 coats system (minimum dft abt 500 μm)

Applied with or without SikaCor Zinc RNot suitable for active cahodic protection High Durability: >15 years (ISO12944)

Tested for Im 1.2.3for renovation of projects where coal tar epoxy Was used3-4 coat system incl. Primeralways applied with primer SikaCor Zinc PURHigh Durability > 15anos (ISO12944)

Tested Im 1,2,3Minimum dft abt. 500 μm (1*coat ou 2*300 μm)Applied with or without SikaCor Zinc RSuitable for active cahodic protectionHigh Durability > 15 anos (ISO 12944)

Sika Poxicolor SW (Main Product)Sika Poxitar / F / SW

SikaCor SW 500 (Main product)SikaCor PUR SW (niche product)


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Poxitar typical examples (Past)Poxitar typical examples (Past)


Sika Poxicolor SW typical examplesSika Poxicolor SW typical examples


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Sika Poxicolor SW typical examplesSika Poxicolor SW typical examples


Chemical ProtectionNo regulated MarketSolution based on experience, laboratory test on diferents areas;Typical industries like:1) Petrochem2) Gases transport3) Waste treatment4) Metalic Industry

Examples: Sika Permacor 2807 HS-ASika Permacor 3326-EG /337……


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Fire Protection – Unitherm

Passive fire protection coating system to Strutural stell

The protection retard the effect of temperature on struture (endotermic

capacity)

Answer according EN13381-Part 4 and 8

Capacity to maintain the stability until 120 minutes for critical temperature between 450ºC and 750ºC.

Example of tickeness calculation Douro Marina- (Jan2012).xls


Stability of Stell in case of Fire

The stell doesn´t burn but it loses stability at about 500/550 °C !


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Standard Temperature/Time Curve acc. ISO 834

Heating of steel

Dev

elop

ing

of te

mpe

ratu

re in

fire


On essentially, the choice of fire protection solution consider:

Cost of application (mortar is shipper compared with coatings) Resistance required of project (critical temperature crossed with time resistance)Appearance if exposed to viewDurability and life to first maintenanceCompatibility with the environment during construction and serviceCompatibility with the corrosion-protection system (inside and outside)Ability to be applied on-site/off-siteMaintenance and repair after damagesNo dust during application

Choise of Intumescent Coating as Passive Fire Protection and not a mortar


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BENEFITS

- rapidly and easily aplication

- covers complex details

- solution doesn‘t occupy additional space

- Long durability and almost free of maintenance

- Also used in the restauration of ornate structural

elements

INTUMESCENT COATINGS


BENEFITS

- low layer thickness of only 0,5 to 3,7 mm

no additional static load is effected

- Choice between application of steel

structures on site…or on shop

INTUMESCENT COATINGS


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Thanks for attentionHelena Beleza, Sika Portugal

Email: [email protected]


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