The words you are searching are inside this book. To get more targeted content, please make full-text search by clicking here.
Discover the best professional documents and content resources in AnyFlip Document Base.
Search
Published by STANCOLAC S.A., 2020-08-28 03:02:17

ANTICORROSIVE PROTECTION SYSTEMS

ANTICORROSIVE
PROTECTION
SYSTEMS

ANTICORROSIVE PROTECTION SYSTEMS

Introduction

There are different ways of protecting
steel structures from corrosion.
Unprotected steel in the atmosphere,
in water and in soil is exposed to
corrosion which will eventually lead to
failure. To avoid this, steel structures
are normally protected to withstand the
corrosion stress during the proposed
life time of a structure.
The ISO 12944 Standard is a series of
instructions intended to guide those who
have some technical knowledge to the
required corrosion protection. It is the
main international standard for corrosion
protection of steel by paint.
Selecting the correct coating system for
protection against corrosion requires a
variety of factors to be taken into account
to ensure that the best technical solution
is achieved.

2

ANTICORROSIVE PROTECTION SYSTEMS

For each project the most important factors to consider
before selecting the adequate protective coating
system are:
A. Environmental Corrosivity
B. Required Durability

3

ANTICORROSIVE PROTECTION SYSTEMS

Factors for the selection
of a protective coating

A. Environmental Corrosivity

The rate of corrosion of a steel substrate
exposed either outdoors or indoors will
vary depending on the level of
corrosiveness of its environment. The
more aggressive an environment, the
higher the rate at which corrosion will
develop.
Standard ISO 12944 specifies the categories
of corrosive atmosphere and environment
that are used to define the appropriate
protection system.

CORROSION ENVIRONMENT EXAMPLES
CATEGORY
EXTERIOR INTERIOR

Heated buildings with a clean atmosphere such as
C1 offices, shops, schools, hotels

C2 Atmospheres with low level polution; mostly, rural Buildings which are not heated where condensation
areas may occur, e.g. storage facilities, sports halls

C3 Industrial and urban atmospheres, moderate sulfur Production halls with high humidity and certain air
dioxide pollution; coastal areas with low salinity pollution, e.g. food processing plants, laundries, breweries
Industrial areas and coastal areas with moderate Chemical plants, swimming pools, ship repair yards

C4 salinity

Industrial areas with high humidity and aggressive Buildings and areas with almost permanent
C5 atmosphere and coastal areas with high salinity condensation and with high pollution

CATEGORY ENVIRONMENT EXAMPLES OF ENVIRONMENTS AND STRUCTURES

Im1 Fresh water River installations, hydro-electric power plants

Im2 Seas or brackish water Immersed structures without cathodic protection
(e.g. harbour areas with structures like sluice gates, locks)

Im3 Soil Buried tanks, steel piles, steel pipes

4

ANTICORROSIVE PROTECTION SYSTEMS

B. Required Durability

The lifetime of the selected coating system depends VERY HIGH > 25 YEARS
on its durability. The higher the durability, the longer HIGH 15 - 25 YEARS
the time to first major maintenance. MEDIUM 7 - 15 YEARS
ISO 12944 specifies a range of four time frames LOW < 7 YEARS
to categorize durability:

5

ANTICORROSIVE PROTECTION SYSTEMS

Surface Preparation

To guarantee that a coating system delivers tools to compete on the global market.
long lasting protection, it is essential to ensure
that the right surface preparation is carried out Our systems offer anticorrosive protection
before any paint is applied. C2-C5 according to ISO 12944 and therefore
are capable of protecting the most demanding
All application on steel, including welding, cut projects.
with flame and smoothing, must be terminated
before the preparation of the surface and the The following protective coatings systems are
remains of the welding process must be indicative. They are extensively tested and
removed. The surface should be cleaned from certified for their anticorrosive protection by
oil, grease and other materials. Following this, accredited European Institutes. Alternative
dry blast-clean to grade Sa 2 ½, in accordance systems are available, including more
with ISO 8501-1. STANCOLAC coating products according to
ISO 12944 guidelines.
STANCOLAC industrial coating systems
have been created to offer a reliable surface For further details, please contact our
protection. Customer service.

We are constantly investing in the certification
of the protective industrial coatings systems in
order to offer to our customers all the necessary

6

ANTICORROSIVE PROTECTION SYSTEMS

Protective Coating Systems

SYSTEM CLASSIFICATION SYSTEM DFT (μm) TYPE OF COATING
No. 100 Zinc phosphate epoxy
100 Epoxy top coat
Top Coat 1 C3H – C4M 1x 812 EPOXY PRIMER 200
Primer
1x 911 EPOXY
Surface Total DFT

Top Coat 2 C3H – C4M 1x 812 EPOXY PRIMER 150 Zinc phosphate epoxy
Primer 1x 5008 PU Polyurethane
Total DFT
Surface 60
two pack

210

Top Coat 3 C4H-C5M 1x 812 EPOXY PRIMER 100 Zinc phosphate epoxy
Mid Coat
Primer 1x 912 EPOXY INTERMEDIATE 100 Epoxy intermediate

Surface 1x 911 EPOXY 100 Epoxy top coat

Total DFT 300

Top Coat 4 C4H-C5M 1x 812 EPOXY PRIMER 100 Zinc phosphate epoxy
Mid Coat
Primer 1x 912 EPOXY INTERMEDIATE 150 Epoxy intermediate
1x 5008 PU Polyurethane
Surface Total DFT
60
two pack

310

Top Coat 5 C4H-C5M 1x 751 EPOXY ZINC PRIMER 75 Zinc rich epoxy
Mid Coat
Primer 1x 912 EPOXY INTERMEDIATE 150 Epoxy intermediate
1x 5008 PU Polyurethane
Surface
100
Top Coat two pack
Mid Coat
Primer Total DFT 325

Surface Inorganic zinc rich
6 C5H 1x 851 INORGANIC ZINC PRIMER 75

ethyl silicate

1x 912 EPOXY INTERMEDIATE 150 Epoxy intermediate
1x 5008 PU Polyurethane

100 two pack

Total DFT 325

7

ANTICORROSIVE PROTECTION SYSTEMS

STANCOLAC S.A.

Thessaloniki, Greece
+30 2310 782 645
[email protected]
www.stancolac.gr


Click to View FlipBook Version
Previous Book
Vocabulary mini book Occupation
Next Book
Fathima_Onam_2020