ДСТУ EN ISO 4042:2022 Крепежные изделия. Системы гальванических покрытий (EN ISO 4042:2022, IDT; ISO 4042:2022, IDT)



ДСТУ EN ISO 4042:2022
(EN ISO 4042:2022, IDT; ISO 4042:2022, IDT)

Кріпильні вироби. Системи гальванічних покриттів

 

 
 
 
     
Не є офіційним виданням.
Офіційне видання розповсюджує національний орган стандартизації
(ДП «УкрНДНЦ» http://uas.gov.ua)

Contents

Foreword

Introduction

1 Scope

2 Normative references

3 Terms and definitions

4 General characteristics of the coating

4.1 Coating metals or alloys and main purposes

4.2 Build-up of basic electroplated coating systems

4.3 Coating systems and coating processes

4.4 Internal hydrogen embrittlement

4.5 Baking

5 Corrosion protection and testing

5.1 General

5.2 Neutral salt spray test (NSS) for zinc-based coating systems

5.3 Sulfur dioxide test (Kesternich test)

5.4 Bulk handling, automatic processes such as feeding and/or sorting, storage and transport

6 Dimensional requirements and testing

6.1 General

6.2 Fasteners with ISO metric thread

6.3 Other fasteners

6.4 Test methods for thickness determination

7 Mechanical and physical properties and testing

7.1 General

7.2 Appearance

7.3 Corrosion resistance related to temperature

7.4 Torque/clamp force relationship

7.5 Determination of hexavalent chromium

8 Applicability of tests

8.1 General

8.2 Tests mandatory for each lot

8.3 Tests for in-process control

8.4 Tests to be performed when specified by the purchaser

9 Designation system

9.1 General

9.2 Designation of electroplated coating systems for the order

9.3 Examples of designation of hexavalent chromium free electroplated coating systems for fasteners

9.4 Designation of fasteners with electroplated coating systems for labelling

10 Ordering requirements for electroplating

11 Storage conditions

Annex A (informative) Design and assembly aspects for joints with coated fasteners

Annex В (informative) Hydrogen embrittlement consideration

Annex C (informative) Corrosion protection related to zinc coatings with chromate conversion coatings

Annex D (informative) Coating thickness and thread clearance for ISO metric threads

Annex E (informative) Coating systems tested in accordance with ISO 9227, NSS — Evaluation of cabinet corrosivity for the neutral salt spray test

Annex F (informative) Obsolete designation codes for electroplated coating systems on fasteners according to ISO 4042:1999

Bibliography