Hempadur Zinc Series

HEMPADUR ZINC series 17340, 17360 and 17380Organic zinc epoxy protection

The Hempel Group Head Office

Hempel A/S Lundtoftevej 150DK-2800 Kgs. LyngbyDenmark

Phone: +45 45 93 38 00Fax: +45 45 88 55 18E-mail: [email protected]: [email protected]

07/2

00

5

Features BenefitsZinc-rich content Excellent corrosion protection

Low VOC Conforms with regulatory demands

Fast drying High productivity

Easy to apply compared with Uniform painting operationsinorganic zinc primers

Can be applied at low temperatures Wide temperature application window. Sameand can cure down to -10°C/15°F product can be used in different climates all year round

Excellent adhesion to substrate Resistant to impact

Produces hard yet flexible film Resistant to abrasion

Features BenefitsMore surface-tolerant than other Easy applicationzinc epoxy coatings

Greater cohesive strength than High impact resistanceother zinc epoxy coatings

Meets requirements for a zinc-rich Conforms with recognised standardsprimer according to SSPC paint specification no. 20, level 3

Features BenefitsVery fast drying Ideal for online production facilities

Approved as primer according to Documented performance in severely corrosiveNORSOK M-501, rev. 4, system no. 1 environments, offshore and onshore

Meets requirements for a zinc-rich Conforms with recognised standardsprimer according to ISO 12944-5 and SSPC paint specification no. 20, level 2.

General features and benefits of HEMPADUR ZINC range

Specific product features and benefits of HEMPADUR ZINC 17340



Features BenefitsCustomised to meet the stringent Provides long-term protection of offshore steelrequirements of the offshore sector structures

Approved as primer according to Documented performance in severely corrosive NORSOK M-501, rev. 4, system no. 1 environments, offshore and onshore

Meets requirements for a zinc-rich Conforms with recognised standardsprimer according to SSPC paint specification no. 20, level 1

“Zinc” about it!The superior performance of zinc-rich coatings stems from the metallic

nature of zinc. These coatings are superior on account of the galvanic

protection they provide. In principle, steel treated with a zinc-rich

coating works like a galvanic cell, where the steel and the zinc become

the electrodes.

Zinc is less noble than steel and therefore acts as an anode, corroding

in place of the steel, and providing galvanic protection in the process.

Zinc also reacts with the oxygen, carbon dioxide and moisture in the

atmosphere to form zinc corrosion products, often referred to as zinc

salt or white rust. This makes the coating practically impermeable

and provides an excellent barrier protection. This is also the reason

that zinc coatings are normally always overcoated with an epoxy/

polyurethane system in order to protect the zinc.

The galvanic protection process also takes effect if the coating is

damaged. In case of minor damage, the coating will repair the spot. If

there is an extensive area of damage, the zinc will prevent rust creep

underneath the surrounding paint film that remains intact.

Optimised formula to match every needThe zinc content in the individual HEMPADUR ZINC products is optimised

to meet particular demands within the heavy-duty construction

industry. The zinc content of HEMPADUR ZINC 17340, HEMPADUR

ZINC 17360 and HEMPADUR ZINC 17380 therefore varies.

HEMPADUR ZINC 17340 is recommended for steel structures exposed

to milder conditions, while HEMPADUR ZINC 17360 and 17380 are

designed to protect steel structures in very aggressive environments.

A series of tests has documented impressive results.

NORSOK M-501 approvedThe performance provided by HEMPADUR ZINC 17360 and 17380

is documented by certification in accordance with NORSOK M-501,

revision 4, for system number 1.

NORSOK testThe cyclic 7-day NORSOK test is repeated for 25 weeks

• 72 hours UV (60°C/140°F) + condensation (50°C/122°F)

• 72 hours salt fog spray

• 24 hours at low temperature (-20°C/-4°F).

Panel with scribe (damage) after 25 weeks of exposure, rust visible in scribe.

Panel after 25 weeks of exposure with paint system removed showing an excellent result with less than 3 mm rust creep.

3 mm

7266 HEMPADUR ZINC_REN2.indd 1-3 30-06-2005 15:15:38

HEMPADUR ZINC 17340 being applied

to a wind turbine tower after abrasive

blasting. An epoxy/polyurethane system

is then applied to ensure maximum

durability and minimum maintenance.

Large steel objects on land require

superior corrosion protection. HEMPADUR

ZINC 17360, followed by either an epoxy/

polyurethane system or direct overcoating

with a polysiloxane, achieves this.

HEMPADUR ZINC 17380 provides the

best possible protection in highly corrosive

offshore and marine environments.

HEMPADUR ZINC 17380 complies with

the highest NORSOK approval ratings.

How to read the Radargram• The Hempel Radargram mapping tool provides customers with a considerable amount of crucial information about

epoxy coatings in a straightforward, easy-to-understand form. The Radargram displays a range of important quantitative and qualitative product performance criteria.

• The Radargram uses a scale from 0 to 10, with 10 as the highest score. An average score of around 4 should be the minimum for an epoxy coating, unless the product has specially designed features. These are difficult to show in a Radargram, which makes general comparisons between all types of epoxy coatings.

• The Radargram is intended as an overall indication of the characteristics and capabilities of the product. The left side of the Radargram provides an indication of the general performance properties – the main focus for the end-user/ owner. The right side gives an indication of the application properties, which are of prime interest for the applicator.

• A blue Radargram indicates that the product is intended for both submerged and dry areas. A red Radargram indicates that the product is intended for dry areas.

• Read more about the Radargram in the Hempel Epoxy Encyclopaedia, in the Hempel Radargram Illustrator or at www.hempel.com.

Zinc Interlocked with steel = No Corrosion

Galvanic protectionThe Hempel range of zinc epoxy coatings is formulated to provide steel structures

with protection against galvanic corrosion in all atmospheric environments. Such

structures include wind turbines installed inland in dry climates, oil and gas platforms

in offshore environments, as well as superstructures, decks, hatch covers/coamings,

masts, etc. on all types of vessels. Whatever the environment, HEMPADUR ZINC

epoxy coatings ensure durability.

HEMPADUR ZINC 17340, 17360 and 17380 epoxy coatings all have high solids

contents, and comply with the strictest environmental regulations for solvent

emission. Organic zinc epoxy coatings such as the HEMPADUR ZINC range are very

easy to handle and often preferred to the slightly more complicated inorganic zinc

silicate, such as the Hempel GALVOSIL range.

Product descriptionThe Hempel range of zinc epoxy coatings consists of HEMPADUR

ZINC 17340, HEMPADUR ZINC 17360 and HEMPADUR ZINC 17380.

Each of these products is designed to meet specific demands

under different corrosion protection conditions for structures in both

industrial and marine environments. These zinc-rich products cure to

a highly corrosion-resistant and durable coating that provides steel

structures with cathodic protection in any atmospheric environment.

Why zinc?Corrosion is an energy exchange process that is based on electrochemical

reactions. Zinc is applied to provide steel with anodic protection, and

is only effective within the medium pH range of 6.0–9.0. In other

conditions, zinc is broken down by acidic or alkaline constituents.

The correct zinc content in the dry film – i.e. the most suitable product

in the HEMPADUR ZINC 173xx series – is therefore a very important

factor when choosing the right zinc epoxy primer.

10

8

6

4

2

Volume solids (%)

6

4

2

6

10

8

6

4

2

Volume solids (%)

6

4

2

10

8

6

4

2

Volume solids (%)

6

4

2

6

HEMPADUR ZINC 17340

HEMPADUR ZINC 17360

HEMPADUR ZINC 17380

Industrial environmentC3–C4 according to ISO 12944-5.

Typical structures

• Inland wind turbine towers

• Factories, bridges, stadiums, etc.

Low VOC system

HEMPATHANE TOPCOAT 55210 50 micron/2 mils DFT

HEMPADUR MASTIC 45880* 100 micron/4 mils DFT

HEMPADUR ZINC 17340 50 micron/2 mils DFT

Fast-drying system


HEMPADUR FAST DRY 15560 100 micron/4 mils DFT


Industrial environmentC4–C5 according to ISO 12944-5.

Typical structures

Onshore/inland steel structures in industrial environments, such as

• Refineries

• Storage tanks

• Container cranes

Low VOC system



HEMPADUR ZINC 17360 40 micron/1.6 mils DFT

Fast-drying system


HEMPADUR FAST DRY 15560 140 micron/5.5 mils DFT


Industrial environmentC5-M according to ISO 12944-5.

Typical structures

• Offshore oil and gas rigs and platforms

• Offshore wind turbines

• Bridges exposed to severely corrosive environments.

Low VOC system




Fast-drying system

HEMPAXANE 55000 100 micron/4 mils DFT

HEMPADUR FAST DRY 15560 140 micron/5.5 mils DFT


Marine environmentAreas suitable for protection by zinc epoxy coatings

• Hatch covers/coamings

• Main decks

• Cranes/masts/etc.

• Superstructures.



HEMPADUR ZINC 173xx 50 micron/2 mils DFT

* or any other high-performing HEMPADUR epoxy product

Applying HEMPADUR ZINC 173xx series

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��

��100%

80%

60%

40%

20%

0%17340 17360 17380

65

81 88

Zinc content in the dry film

Typical uses and recommended specificationsWhy Zinc?Corrosion is an electrochemical driven process of energy exchange. Zinc is appliedto protect the steel as the anode. Zinc is only effective within the medium pH rangeof 5.5 - 9.5, outside this environment zinc will be broken down by the acidic oralkaline constituents.

The correct zinc content in the dry film is a very important factor when choosing theright zinc epoxy primer, the HEMPADUR ZINC 173xx series is therefore tailor madeto suit all possible environments.

Application of HEMPADUR ZINC 173xx series.

Steel substrate

Zn primer

ElectrolyteZn++ Zn++

OH-

e

OH-OH-

OH-

e Steel substrate

Zn primer

ElectrolyteZn++ Zn++

OH-

e

OH-OH-

OH-

e

Zinc particle

Zinc “corrosion”Steel

Zinc particle

Zinc “corrosion”

Zinc particle

Zinc “corrosion”Steel

Zinc particleZinc particle

Zinc “corrosion”Zinc “corrosion”Steel

e- e-Steel substrate

Zn++ Zn++

Electrolyte

OH-OH-

OH-OH- Zn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primerZn primer

7266 HEMPADUR ZINC_REN2.indd 4-6 30-06-2005 15:16:55

Documents

Hempadur Zinc Series