Part 8 of the standard deals with development of specifications for the protection of steel structures from corrosion by using coating systems. The standard includes pre-treatment and paint application methods. Execution and supervision of paint work (part 7)Īs you would expect, the standard also deals with how coating of steel structures is executed and supervised, either on-site or in the workshop. Testing should help users decide which coating system should be used, and so standardises testing to enable more accurate and comparable testing that acts as a guide (but not exact information) for determination of durability within a given environment. Testing methods and conditions are detailed in ISO 12944. The paint system used will depend upon the environment in which it is to be used and the intended durability, and ISO 12944 covers this. Standards for the preparation of surfaces are given, with the objective of minimising the risk of premature failure of the coating system used. The standards covered here deal with the basic criteria for the design of steel structures that are to be coated to avoid premature corrosion of the substrate. Corrosivity, environments, and categories (parts 2 and 9)Įnvironments are classified across several categories, with recommendations that cover atmospheric exposure, fresh and seawater immersion, and buried surfaces. Within the nine parts of ISO 12944, standards are provided across the following themes: 1. Individuals who must work to the standard include: Those who need to adhere to ISO 12944 include asset owners, construction companies, engineering companies, corrosion consultants, paint manufacturers and painting companies. The standard is designed for use by all those who have some experience and knowledge of either specifying, manufacturing or using paint and coatings to protect steel structures against corrosion in different environments.

Coating system specificationsīased on the corrosivity of the environment and the durability of corrosion protection needed, ISO 12944 acts as a guide to selecting the coating system required for the steel structure to be protected. The standard also emphasises that inspection and minor maintenance should be expected throughout the lifetime of the structure. The expected lifetime of the coating system until its first major maintenance. To achieve this, the standard classifies the environment into categories that are rated on their ability to corrode unprotected steel. The potential of the environment to cause corrosion. The standard covers three factors when dealing with protecting steel structures from corrosion: 1. It does not cover coatings for concrete, non-metallic substrates, high-temperature surfaces, chemical immersion, and other uses. The standard covers paint and coatings for steel structures in atmospheric, immersed, and buried environments. Having been introduced in 1998, it was updated in 2007 and revised a second time in 2018. ISO 12944 is a globally recognised standard that lays out the rules and guidelines for the protection of assets from corrosion by use of coating systems and paint. This article introduces the standard, answering the key questions that professionals in corrosion prevention ask about it.

Setting standards for coatings for steel structures in atmospheric, immersed, and buried environments, ISO 12944 now has nine parts. Corrosion protection of steel structures by protective paint systemsįirst introduced as an eight-part standard in 1998, ISO 12944 was updated for the second time in 2018 with some significant changes and additions.

Din en iso 12944 part 6