Bs en iso 12944 partie 5

Protective paint systems. October Code of practice for protective coating of iron and steel structures against corrosion. Our policy towards the use of cookies Techstreet uses cookies to improve your online experience. They were placed on your computer when you launched this website. You can change your cookie settings through your browser. Request Free Trial. Language: English. Full Description This document describes the types of paint and paint system commonly used for corrosion protection of steel structures.

It also gives guidelines for the selection of paint systems available for different environments see ISO except for corrosivity category CX and category Im4 as defined in ISO and different surface preparation grades see ISO , and the durability grade to be expected see ISO This coating system delays the corrosion of the metal because it can seal off the surface of the steel from the local microclimate that surrounds it and would otherwise generate rust.

ISO consists of eight parts, each of which either addresses specific considerations or covers a step of the process in-depth.

ISO — Paints and varnishes — Corrosion protection of steel structures by protective paint systems — Part 1: General introduction does not define a specific procedure, instead it gives the background needed to make use of the collective documents. It establishes the scope of the standard, specifying that it be used only for corrosion prevention, and not for related surface protection against other forces such as microorganisms, chemicals, mechanical action, and fires.

Building off this, ISO — Paints and varnishes — Corrosion protection of steel structures by protective paint systems — Part 2: Classification of environments classifies the principle environments to which structural steel can be exposed.

This defines atmospheric-corrosivity categories based on mass loss, describes environmental categories for structures immersed in water or buried in soil, and gives information on some special corrosion stresses. As the initial phase in the protective paint procedure, ISO — Paints and varnishes — Corrosion protection of steel structures by protective paint systems — Part 3: Design considerations calls for the steel structures to be designed in a manner that not only assures for their general support but also makes it easier to facilitate the preparation, application, and maintenance of protective paint.

Since certain structural shapes are more susceptible to corrosion, it is recommended that the designer contact a corrosion expert very early in the process so that the structure does not corrode prior to application. ISO — Paints and varnishes — Corrosion protection of steel structures by protective paint systems — Part 4: Types of surface and surface preparation defines a number of steel structure surface types and gives requirements addressing their preparation for the application of the paint.

These requirements assure that the surface is free of any deleterious matter that could limit the adhesion of the primer to the steel.

ISO — Paints and varnishes — Corrosion protection of steel structures by protective paint systems — Part 5: Protective paint systems focuses on the other primary component of a protected structure: the paint system itself. This part describes the different types of paints and coating materials and gives guidance for their selection based off the classification of environments and surfaces as established by the prior parts of the collective standard.

The last section assisting in the selection of paint system is ISO — Paints and varnishes — Corrosion protection of steel structures by protective paint systems — Part 6: Laboratory performance test methods.

This document addresses laboratory-testing procedures used to determine the success of a particular protective paint system. One of the methods discussed to aid in the selection of a paint system is artificial ageing, which is meant to estimate the reliability of the anti-corrosion application over time.

ISO — Paints and varnishes — Corrosion protection of steel structures by protective paint systems — Part 7: Execution and supervision of paint work deals with the actual application of the protective paint system to the steel structure, and gives requirements on its execution, in addition to the management of the paint and the workers.