Vigas

USER MANUAL

Metallic coated steel

USER MANUAL

Metallic coated steel
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Introduction 1.1 Metallic coated steel in our daily life 1.2 Definition 1.3 Environment Products 2.1 Introduction 2.2 Quality or grade of the steel 2.3 Types of coating 2.4 Mass or thickness of the coating 2.5 Surface aspect 2.6 Surface quality 2.7 Surface treatment 2.8 Tolerances on dimensions and shape Productionprocess 3.1 Hot dip coating 3.2 The electrogalvanising process 5 6 6 6 9 10 10 10 12 12 13 13 14 15 16 17

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Everything fragile protects itself. It’s a law of nature. Take a bird’s plumage, for example. The composition of the tectrices and the way they are arranged protect the bird’s skin from the rain and the wind. The oily secretion water birds spread over their feathers makes themperfectly waterproof. Arcelor’s metallic coated steel is protected in a similar way from the vagaries of the wind and the weather. And because we respect humanity and the environment, we have developed metallic coatings without any toxic elements such as lead or chromate. Arcelor has consciously opted for sustainable development, out of respect for life. Today and tomorrow. Steel solutions for a betterworld.

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Durability and protection 19 4.1 Mechanism of corrosion protection offered by metallic coatings 20 4.2 Accelerated tests 22 4.3 Contact between metallic coatings and other materials 22 Recommendations for use 5.1 General recommendations 5.2 Recommendations for transport and storage 5.3 Recommendations for decoiling, slitting, cutting to length, shearing and cutting 5.4 Durability ofcut edges Forming 6.1 Introduction 6.2 Bending 6.3 Roll forming 6.4 Deep drawing Joining 7.1 Adhesive bonding 7.2 Clinching 7.3 Riveting 7.4 Lock seaming 7.5 Joining with bolts, studs, clips etc 7.6 Welding Painting 8.1 Introduction 8.2 Pretreatment 8.3 Painting Conclusion 23 24 24 24 25 27 28 28 30 33 37 38 39 39 40 41 41 47 48 49 52 53 55

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Credits and copyright

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Introduction
Metallic coated steel in our daily life Definition Environment 6 6 6

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Introduction

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Metallic coated steel in our daily life

• The electrogalvanising process, in which metal is deposited electrolytically on the cold steel strip. • Coating under vacuum, such as PVD (Physical Vapour Deposition), CVD (Chemical Vapour Deposition) etc. This manual doesnot deal with these processes. Process Products Hot dip coating Galvanised (Z): pure zinc coating Galfan (ZA): zinc/aluminium coating Aluzinc® (AZ): aluminium/zinc/silicon coating Alusi® (AS): aluminium/silicon coating Alupur® (AL): pure aluminium coating Electrodeposition Zincor® (ZE): pure zinc coating

The wide range of metallic coated steel is an integral part of our daily life: it is used toprotect, shelter, package and transport and at the same time meets the demand for a solid, durable and aesthetically pleasing material. Continuous metallic coated steel has experienced a remarkable growth and continues to be used in increasingly varied new fields. This is due to its outstanding economic, technological and environmental advantages. In building and construction, metallic coated steelhas been used for profiling, cladding and roofing for many years, but it is also used for applications such as doors, stairs, ceilings etc. These products have a very wide range of applications in general industry, e.g. furniture, air conditioning, tanks, thermal shields etc. The domestic appliance sector is also a big user of metallic coated steel. There is even a trend today towards buildingdomestic appliances entirely from metallic coated steel, both white goods (refrigerators, washing machines, ovens etc) and brown goods (teletronics, video, hi-fi etc).

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1.3 1.2 Definition

Environment

Metallic coated steel can be defined as a steel substrate coated with a layer of zinc, a zinc/aluminium alloy, a zinc/silicon alloy or pure aluminium. metallic coating

Metallic coated steel...