The protective systems in the tables have unique identities. As we have no control over either quality or condition of the substrate and other factors affecting the use and application of the products, we cannot accept any liability whatsoever or howsoever arising from the performance of the product or for any loss or damage arising from the use of this product, unless otherwise agreed in writing. In such cases, a coating system appropriate to the environment category should be provided. The tables give two figures for durability: Structure life The period of reasonable freedom from severe corrosion of the steelwork that might lead to weakening of the structure. For steelwork that is visible, the should be surface treated and coated as shown.
It should be noted that this does not imply a guarantee of life expectancy. In many instances, steelwork will be in a warm dry interior where it will not corrode, and the structural stability of the building will not be threatened during its design life generally taken as 50 years. It is important that the manufacturers' instructions are carefully followed to ensure successful results. For more details about the use of the stated products, refer to the relevant product data sheet. Indefinite 2 Transpoxy Masterbond Epoxy polyamine 83 125 6.
Developed in the 1990s, it describes the types of paints, varnishes and paint systems commonly used for protecting steel structures from corrosion. It is important that the steelwork is thoroughly degreased and free from any contamination. Paint systems are typically tested against higher levels of corrosivity because a coating that can protect against the most severe C5-M or C5-I environments is certainly capable of providing protection in a less severe environment. The updated standard has changed in a number of ways regarding the recommended composition of paint systems, including the number of recommended coats, dry film thicknesses, etc. Deacon 2002 , Steelwork Corrosion Control 2nd edition , Spon Press. It is the expected life, in years, before first major maintenance.
The substrate must be dry and free from salts and other contaminants. Visual assessment of surface cleanliness. Learn more about the cookies we use and how to change your settings. Document Status Indicators The Green document status indicator indicates that the document is: Corrosion protection of steel structures by protective paint systems. Remove weld spatter and smooth weld seams and sharp edges as applicable. It does not address maintenance in general where methods of surface preparation other than abrasive blast-cleaning are typically used.
The treatment specified for cavity wall condition should also be suitable for the interior environment of the building. The life of the total protection system without maintenance should exceed 25 years, however, it is anticipated that for aesthetic reasons maintenance will be carried out at periods of 10 years or less. For more information about how to choose the right coating system to fit you needs, please have a look in our on the subject. Examples include steelwork inside dry buildings with neutral atmospheres such as , , , hotels, , airport terminals, and , etc. Specialist advice should be sought. However, it is important to note that a coating capable of providing protection at a higher level also protects well at every corrosivity level below the level tested — without impacting coil efficiency. Want access to British Standards? Guidelines and recommendations for the protection against corrosion of iron and steel in structures.
Where colour stabilization is required for appearance purposes, this can be achieved by the application of the finish coat in this system. Hidden steelwork is assumed to be not accessible for maintenance, thus a figure for coating life of hidden steelwork systems is not applicable. This document is applicable for paint systems for submerged service Im4 which are intended for ambient operating temperatures up to a maximum of 50 °C. However, when steelwork is exposed to moisture, will occur at a rate depending on the severity of the environment. It also provides guidance on the selection of paint systems available for different environments and different surface preparation grades, and the durability grade to be expected.
More frequent re-coating may often be preferred for decorative reasons because of fading, contamination, wear and tear, etc. It is not applicable to surfaces under insulation or concrete. Again there may be more recent versions of the document. Take the smart route to manage medical device compliance. For example, 80µm can be in one coat or as 20µm prefabrication primer plus 60µm post-fabrication primer. This document specifies: — the test methods to be used to determine the composition of the separate components of the protective paint system; — the laboratory performance test methods for the assessment of the likely durability of the protective paint system; — the criteria to be used to evaluate the results of performance tests.
All steel structures, facilities and installations that are exposed to the atmosphere, under water or in soil suffer from corrosion. For example, 80µm can be in one coat or as 20µm prefabrication primer plus 60µm post-fabrication primer. However, where steelwork within the cavity is deemed to be in a more aggressive environment category, the application of a high build bitumen coating at 150µm to the faces of the steelwork within the cavity may be applied before or during construction. This article is designed to assist those responsible for either drafting corrosion protection specifications, or as contractors with a requirement to meet that which is specified. C5-M Typical coating system Condition: A high durability coating system for environmental conditions classified as C5 M-very high corrosivity marine.
Visible steelwork will normally be accessible for maintenance and if repainting is carried out the quoted structure life will be extended. . For example, 80µm can be in one coat or as 20µm prefabrication primer plus 60µm post fabrication primer. This document covers the requirements for new work and any repairs necessary before start-up. Partie 7: Exécution et surveillance des travaux de peinture.
It was developed in the 1990s, with the first edition published in 1998. The Amber document status indicator indicates that some caution is needed when using this document — it is either: Your basket is empty. Please read the actual product datasheet for more information. Accept and continue Learn more about the cookies we use and how to change your settings. This document deals with structures, made of carbon steel of not less than 3 mm thickness, which are designed using an approved strength calculation. This document specifies the performance requirements for protective paint systems for offshore and related structures i. The standard consists of a series of instructions that guide the professional to achieve the required corrosion protection.