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ABOUT US

Our in-house team of engineers and designers is dedicated to innovation, research and development.
Lessons learned on each project are continuously used to improve our products and processes.
We strive to stay at the spearhead of our industry and provide architects with better tools and building solutions to design striking and timeless buildings.

Quality

Select your ISO 12944
compliant system in
3 easy steps

Step 1
Select the corrosive
environment

Use the following table to select the most
appropriate classification for your project:

ISO 12944 CLASSIFICATION

TYPICAL ENVIRONMENTS

C1
C2

Heated buildings/neutral atmosphere
Rural areas, low pollution

C3

Urban and industrial atmospheres
Moderate sulfur dioxide levels
Production areas with high humidity

C4

Industrial and coastal
Chemical processing plants

C5I

Industrial areas with high humidity
and aggressive atmospheres

C5M

Marine, offshore*, estuaries, coastal
areas with high salinity

* Corrosion protection in ISO 12944 C5M - Offshore environments is being
addressed via a new standard (ISO 20340) dedicated to this environment

These environments are based on experiments that have measured the rate of metal loss for uncoated steel. The classification of environments applies to structural steel exposed to ambient (less than 120°C [248°F] ) conditions.


Many city locations could be classified as ISO 12944 C3

Step 2
How long until first
major maintenance?

Use the following table to select how durable you want your coating system
to be. The higher the durability, the longer the time to first major maintenance:

High Durability

>15 years to first major maintenanc;

Medium Durability

5-15 years to first major maintenance

Low Durability

<5 years to first major maintenance

Remember, when selecting the most cost effective system for your project, durability does not equate to a guarantee time. Durability relates to the performance duration of the coating system before first major maintenance. Regular minor maintenance should always be anticipated in order to achieve the required life to first major maintenance.


C5M Marine environments present the toughest conditions
and require more durable systems

Why is ISO 12944 so important?

ISO 12944 Paints & Varnishes - Corrosion protection of steel structures by protective paint systems (parts 1-8) (1998).

The ISO 12944 standard is intended to assist engineers and corrosion experts in adopting best practice in corrosion protection of structural steel at new construction.

ISO 12944 is progressively superseding regional standards to become a truly global benchmark in corrosion control.

Selecting specifications that comply with ISO 12944 provides you with:

 Confidence that the corrosion protection you specify will be fit for purpose
 An objective approach to coating selection
 A simplified matrix of coating systems to select from
 A meaningful coating design life
•  A universally accepted standard

Understanding your ISO environment can help to tailor specifications, ensuring your coatings are not under or over specified and saving you unnecessary cost.

Step 3
Select your ISO 12944
compliant system

The coating systems described in this brochure have been evaluated against ISO and ASTM test standards and self certified to ISO 12944 part 6.

ISO 12944 Environment

Design Life/Durability <5 years

Design Life/Durability 5-15 years

Design Life/Durability >15 years

C1

A

A

A

C2

A

A

A

C3

B or C

B or C

D, E or F

C4

#

G or H

G or H

C5I and C5M

#

I or J

I or J

# We do not routinely recommend systems for Design Lives <5 years in C4 or C5 environments

Reference

Coating System

DFT

CONTAINS Free
Isocyan Ate (1)

System VOC Aesthetic Durability (2) Corrosion Resistance (3)
A Interlac® 665
or Intergard® 345
@ 80μm (3.1 mils)
No
<40g/m2
B Intergard® 345 (4) @ 160μm (6.3 mils)
No
<73g/m2
★★
C Intercure® 99 (5) @ 160μm (6.3 mils)
Yes
<40g/m2
★★★★
★★★
D Intercure® 99 (6) @ 200μm (8 mils)
Yes
<50g/m2
★★★★
★★★
E Intercure® 200HS
Interthane® 990 (7)
@ 150μm (6 mils)
@ 50μm (2 mils)
Yes (6)
<80g/m2
★★★(8)
★★★
F Intercure® 200HS
Interfine® 878
@ 150μm (6 mils)
@ 50μm (2 mils)
No
<60g/m2
★★★★★
★★★
G Intercure® 200HS
Interfine® 878
@ 205μm (8 mils)
@ 75μm (3 mils)
No
<85/m2
★★★★★
★★★★
H Interzinc® 52
Intergard® 475HS
Interthane® 990 (7)
@ 75μm (3 mils)
@ 155μm (6.1 mils)
@ 50μm (2 mils)
Yes
<112g/m2
★★★(8)
★★★★
I Interzinc® 52
Intergard® 475HS
Interthane® 990 (7)
@ 75μm (3 mils)
@ 200μm (6.1 mils)
@ 50μm (2 mils)
Yes
<126g/m2
★★★(8)
★★★★★
J Interzinc® 52
Intergard® 475HS
Interfine® 878
@ 75μm (3 mils)
@ 200μm (6.1 mils)
@ 60μm (2 mils)
No
<100g/m2
★★★★★
★★★★★

(1) Coatings containing isocyanate have known health and safety issues during application. Many of our products contain no free isocyanate.

(2) Aesthetic durability is a measure of gloss and color retention. These results are based on ISO and ASTM testing carried out in an ISO 9001 certified laboratory.

(3) Corrosion resistance is a measure of the anticorrosive performance. These results are based on ISO and ASTM testing carried out in an ISO 9001 certified laboratory.

(4) Durability (gloss and color retention) when exposed to sunlight can be significantly improved by topcoating this specification with Interthane® 990 @ 50μm (2 mils). In these instances it is possible to reduce the thickness of Intergard® 345 from 160μm (6.3 mils) to 100 - 125μm (4 - 5 mils).

(5) Fast dry in 1½ hours at 25°C (77ºF) Intercure® 99 will reduce (VOC) emissions, improve productivity and increase aesthetic durability compared to Intergard® 345.

(6) Intercure® 99 can be a direct replacement for two coat systems in C3 environments. Fewer coats means improved productivity and Intercure® 99 dries fast in 1½ hours at 25°C (77ºF), has excellent aesthetic durability and can reduce the overall VOC emissions of your system.

(7) Interthane® 990 is a high gloss finish - if a semi-gloss finish is required it can be replaced by Interthane® 870 specified at 100μm (4 mils). In this instance the previous coat can be reduced by 50μm (2 mils) in order to achieve the same total dry film thickness (DFT).

(8) As Interfine® 878 contains no free isocyanate, replacing Interthane® 990 with Interfine® 878 will reduce health and safety concerns and will also increase aesthetic durability to 5.

You can have
confidence
in our coatings

• Continual investment in state of the art R&D and test facilities
• Testing to industry standards including NACE, ASTM, ISO, NORSOK, NSF and more
• Customized testing to meet specific customer and project needs
• Extensive in-house test data
• Independent testing and approvals
• In-field testing and proof of performance track record.

Sustainability

Here at AkzoNobel, we are committed to sustainability and are ranked number one on the influential Dow Jones Sustainability Index (DJSI), demonstrating our commitment to improving our environmental and social performance.
We will work with you to help ensure that your coating specification will meet your overall sustainable design credentials.

Global organization

As your global partner we provide consistent solutions, time and time again. Designing assets, fabricating and constructing in numerous locations across the world? Combining worldwide manufacturing and local distribution networks with our global product range helps to reduce the complexity in specification and the variance in quality. From us, this means one product, one datasheet regardless of location.
We supply consistent products and consistent service, whenever and wherever you need it. From three global state of the art R&D facilities in the UK, USA and China, we are developing the coatings of tomorrow for your business. Our design and development, marketing, technical and commercial support are accredited to ISO 9001 which means you can have absolute confidence in our products and services.

Learn more about GuoXing
Facilities
We are experts in manufacturing and fabricating a wide range of structural steel work structures of varying scope.
Empowerment
The company continuously passed CE
Safety
Whether at our plants or on jobsites, Guoxing makes zero compromises when it comes to safety.