Jotun Presentation

TKr/Zinc Primers Jotun/Oct. 2007/Jotun/Coatings/Marketing

Jotun Coatings Zinc Primers

Zinc PrimersZinc PrimersJotunJotun



Agenda

• Corrosion• Corrosion protection with Zinc• Technology• Zinc epoxy versus Zinc silicate • Zinc confusions• Zinc content in Jotun zinc primers • Barrier and Resist projects



Corrosion• Corrosion is a reaction between

• Material and

• Surrounding environment

…….under formation of corrosion products



Production and degradation of steelReaction between the material and

the surrounding environment takes place

The presence of Water / Humidity and Oxygen is a prerequisite for corrosion of steel

Plates, pipes,profiles, etc.

Ener

gy

Manuf

actu

ring

Water /Hum

idity

Oxygen

Raw materialIron ore Rust



Manufacturing / refining - brings the material to a higher energy level

• The resistance against oxidation (corrosion) varies for

different materials

• When brought in contact with an electrolyte (aqueous

solution that conducts electricity) some metals easily

dissolve into ions. These are called “Base metals”

• “Noble metals” have a very strong resistance against

corrosion and do not react to form ions unless exposed to

very aggressive chemicals



Corrosion / degradation- brings the material "back" to the stable situation

Corrosiveness in an environment increases or varies with:• Temperature• Salinity• Oxygen content• Water velocity• Acidity• Type of electrolyte• Content of contaminants / pollution that promotes

corrosion • Micro-organisms

Oxidation of metals is a natural process



Still the best …..

• Zinc containing primers are still the best foundation for a long lasting advanced paint system

– Cathodic protection

– Self repairing

– Reducing risk of undercutting corrosion



The ability of providing cathodic protection

Zinc primer

Topcoat

Superior adhesion prevents coating undercut

Moisture allows Zinc to ionize and cathodically protecting the steel

Damage in coating to steel surface

The zinc primer reacts to protect thesteel substrate when the topcoat is damaged

SteelZn

2+

Mid coat



Technologies• Shopprimers

– Preliminary corrosion protection– Welding and burning properties– Compatible with advanced paint systems

• Zinc epoxy primers– Epoxy binder– Primer on UHPWJ and blast cleaned steel– Corrosion protection– Primer in advanced paint systems

• Zinc silicate primers– Silicate binder– Primer on blast cleaned steel– Corrosion protection– Primer in advanced paint systems



Technologies – zinc shopprimers

• Binders– Ethyl silicate– Alkali silicate (water borne)

• Zinc content– Low – Medium

• Preliminary corrosion protection– 6 – 14 months

• Welding and burning properties– products tailored to productivity

• Compatible with advanced paint systems



Zinc shopprimers

Muki Z 2001 Muki Z 3000 Muki Z WB-14 FW

Generic type Low zinc silicate Medium zinc silicate Medium zinc silicate

Volume solids 28 % 28 % 62 %

Protection time 6-8 months 8-10 months 12-14 months

Recommended DFT

15-20 microns 15-20 microns 15-25 microns

Colours Green, red, grey Green, red, grey Grey

Weldability Excellent Good Optimum

Cutability Excellent Good Optimum



Technologies - zinc primers• The classification of zinc-rich primers refers to the binder

– Two different binders– Silicate – inorganic (solvent borne and water borne)– Epoxy – organic (solvent borne and water borne)

• In general the inorganic binders have better electrical conductivity than the organic binders and will give a metallic conductivity all through the coating

• Industry guidelines for minimum zinc requirements is given by organisations and specifications



Zinc silicates and zinc epoxies(Resist 86 and Barrier)

Observations after maintenance work done under severe and difficult conditions in the Ekofisk field, North Sea Environments



Barrier + vinyl system Resist 86 + vinyl system



9 years after last maintenance

Barrier + vinyl system




Resist 86 + vinyl system



















Chemistry - zinc primers

Inorganic : Network of zinc, oxygen and silicon atoms chemically bonded to each other and to the steel substrate

Organic : Metallic zinc particles "floating" in a cured epoxy binder network. The high content of zinc ensures metallic contact between the zinc and the steel substrate, and between the individual zinc particles.



Properties - zinc epoxy

• Chemically curing• Good corrosion protection• Good adhesion• Pre-treatment: UHPWJ to WJ2 or

Sa 2½• Good mechanical strength• May be recoated with all types

of paint, except alkyd• Dry heat resistant up to 120ºC• Short over-coating time

• Temperature dependent• 2-component (water borne 3-comp)

• Film thickness: 25 - 90 m• Not acid- and alkaline resistant

(Resistant between pH 6-10)

Advantages Considerations



Where to use - zinc epoxy primers

• Ships• Offshore• Industry

• New constructions / Maintenance• Exterior and interior, above and

below water (as holding primer for underwater use 20-30 microns)

• Blast cleaning to UHPWJ WJ2 or Sa 2½

Segments

Objects

Surface preparation



Properties - zinc silicate primers

• Very good corrosion protection• Very good solvent resistance• Very high heath resistance

(max 400oC)• Very high mechanical strength• Very good adhesion to blast

cleaned steel• Relatively good recoatability• May be recoated with all types of

paint, except Alkyd

• Requires humidity for curing• 2-pack• Max. DFT: 100 µm

– (alkalisilicate 200 µm )

At higher DFT tendency of mud-cracking or checking

• Curing to be checked before over-coating (ASTM 4752)

• Use a tie coat or mist-coat/full-coat technique for the first subsequent coat

• Shelf life : 6 months at 23ºC (alkali silicate 18 – 24 months)

Advantages Considerations



Where to use - zinc silicate primers

• Ships• Offshore• Industry

• New constructions / (maintenance)• Exterior above the waterline• Tank coating and water ballast tank

• Blast cleaning to minimum Sa 2½

Segments

Objects

Surface preparation



Jotun zinc primersProducts Vol.solids Generic Type

Barrier 53 % Epoxy

Barrier ZEP 54 % Epoxy

Barrier 77 53 % Epoxy

Barrier 90 53 % Epoxy

WaterFine Barrier 56 % Epoxy - water borne

Resist 78 72 % Ethyl-silicate, inorganic

Resist 86 67 % Ethyl-silicate, inorganic

Resist GTI 67 % Ethyl-silicate, inorganic

Resist 5 WF 75 % Alkali-silicate, inorganic, water borne



Zinc - confusions….

“Zinc dust” 100%

“Zinc” 98.5 % Other components like lead and other impurities: 1.5%

“Metallic zinc” 94%

- The raw material consists of…

“Zinc oxide” 4.5%

Total zinc is the sum of all the zinc compounds in the formulation including: Zinc dust, zinc oxide, zinc phosphate etc.



SSPC - Paint 20

• Zinc rich Inorganic and Organic• Zinc dust content

– Level 1• Zinc dust 85% weight in dry film

– Level 2• Zinc dust 77%, < 85% weight in dry film

– Level 3• Zinc dust 65%, < 77% weight in dry film

• Zinc dust quality according to ASTM D 520



ISO 12944 (and Norsok)

• Zinc dust content – Zinc dust 80% weight in dry film

• Zinc dust quality according to ISO 3549



ASTM D 520 - levels for lead content

Defines type of zinc dust for pigmentation of coatings

• Type I

– No max. level of lead content• Type II

– High purity grade, max. 0,01% lead content by weight

• Type III

– Highest purity grade, max. 0,002% lead content by weight



Zinc in our epoxy primersZinc dust Zinc Metallic zinc Zinc oxide

Barrier * 80,0 78,8 75,2 3,6 Barrier 77 77,0 75,8 72,4 3,5 Barrier 90 90,0 88,7 84,6 4,1 Barrier Zep 50,0 49,3 47,0 2,3 WaterFine Barrier 80,0 78,8 75,2 3,6

* In addition to the zinc dust, 6% zinc oxide is added, giving Barrier a total zinc content of 86%

Standard specification for zinc in Jotun products is ≤ 0.01% lead content

Barrier, Barrier 77, Barrier 90 can be supplied with ASTM D520 Type II zinc dust



Zinc in our silicate primers

Zinc dust Zinc Metallic zinc Zinc oxideResist 78 78,0 76,8 73,3 3,5 Resist 86 86,0 84,7 80,8 3,9 Resist 5 WF 90,0 88,7 84,6 4,1 Resist GTI 86,0 84,7 80,8 3,9

Standard specification for zinc in Jotun products is ≤ 0.01% lead content

All Resist products can be supplied with ASTM D520 Type II zinc dust



Barrier in projects

Kola Bridge, Russia

Ivana B platform, one of several installations with Barrier on the Ivana field in The Adriatic Sea

Tianjin port, China 12 units of RMG



Resist in projects

Essar Oil Refinery at Vadinar in Gujarat, India

3x660 MW power complex BARH STPP in India

Guangzhou New International airport, China



Jotun Zinc Primers

Protects Properties

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