Einführung
ISO (Internationale Standardisierungsorganisation) ist ein globaler Verband nationaler Normungsgremien (ISO-Mitgliedsorganisationen). Die Entwicklung internationaler Standards erfolgt in der Regel durch technische Komitees der ISO. Jede Mitgliedsgruppe, die sich für ein Thema interessiert, für das ein Fachausschuss eingerichtet wurde, hat das Recht, im Ausschuss vertreten zu sein. Internationale Organisationen, An dieser Arbeit sind auch Regierungen und Nichtregierungsorganisationen beteiligt, die mit der ISO in Kontakt stehen. ISO arbeitet eng mit der International Electrotechnical Commission zusammen (IEC) in allen Fragen der elektrischen Normung.

Teil 1 of the ISO/IEC Directive describes the procedures used to develop this document and for further maintenance. Insbesondere, Es sollte auf die unterschiedlichen Genehmigungskriterien geachtet werden, die für verschiedene Arten von ISO-Dokumenten erforderlich sind. This document has been drafted in accordance with the editorial rules of ISO/IEC Directive Part 2 (siehe iso.org/directives).

Please note that some elements of this document may be the subject of patent rights. ISO ist nicht dafür verantwortlich, einige oder alle dieser Patente zu identifizieren. Details of any patent rights identified during the development of the document will be found in the introduction and/or list of ISO Patent declarations received (siehe iso.org/patents).

Any trade names used in this document are provided as information for the convenience of the user and do not constitute an endorsement.

ISO 11844-1-2020 Korrosion von Metallen und Legierungen – Klassifizierung der geringen atmosphärischen Korrosion in Kammern – Teil 1: Bestimmung und Abschätzung der Korrosion in Kammern

Voluntary interpretation, related standards and conformity assessment related ISO specific terminology and express the meaning of and the ISO in the technical barriers to trade (TBT) adhere to the principle of the world trade organization (WTO) Information, please see the iso.org/iso/foreword.html.

This document, prepared by the ISO/TC 156 Technical Committee on Corrosion of Metals and Alloys in collaboration with the CEN/TC 262 Technical Committee on Metals and Other Inorganic Coatings of the European Committee for Standardization (CEN), covers corrosion protection and corrosion testing of metals and alloys. According to the Technical Cooperation Agreement between ISO and CEN (Wiener Abkommen).

The second edition cancels and replaces the first edition (ISO 11844-1:2006), which has been technically revised. The main changes compared with the previous edition are as follows:

– Added a reference to the ISO 16000 series in Article 7;

– Added a model for estimating indoor concentrations and deposition of pollutants originating outdoors;

Lead has been used as a standard sample for high sensitivity to vaporous organic acids.

Eine Liste aller Teile in der ISO 11844 Serien finden Sie auf der ISO-Website.

Any feedback or questions on this document should be referred to the user’s national standards body. A complete list of these institutions can be found at iso.org/members.html.

ISO 11844-1-2020 Korrosion von Metallen und Legierungen – Klassifizierung der geringen atmosphärischen Korrosion in Kammern – Teil 1: Bestimmung und Abschätzung der Korrosion in Kammern

einführen

Metals, alloys and metal coatings are susceptible to atmospheric corrosion under the influence of air humidity, especially when gaseous and solid substances of atmospheric pollution work together. The importance of corrosion data in deriving appropriate corrosion protection or assessing the suitability of a product’s metallic elements cannot be overstated.

ISO 9223 classifies atmospheric environments into six corrosive categories.

A low corrosive indoor atmosphere is an indoor atmosphere that meets the C 1 (very low) or C 2 (niedrig) corrosive category of ISO 9223.

The classification in ISO 9223 is too broad for certain uses in low-corrosive indoor atmospheres, such as places to store electronic equipment, precision technology products, or art and historical objects.

Aus diesem Grund, it is necessary to subdivide the corrosivity categories C 1 (very low) und C 2 (niedrig) into the indoor corrosivity categories given in this document.

The assessment of low corrosive indoor atmospheres can be done by directly determining the corrosion attack of the selected metal (siehe ISO 11844-2) or by measuring environmental parameters that may cause corrosion of metals and alloys (siehe ISO 11844-3).

ISO 11844-1-2020 Korrosion von Metallen und Legierungen – Klassifizierung der geringen atmosphärischen Korrosion in Kammern – Teil 1: Bestimmung und Abschätzung der Korrosion in Kammern

This document describes general procedures for deriving and estimating categories of indoor corrosivity.

The purpose of this document is to describe the characteristics of low-corrosive indoor atmospheric environments that may affect metals and metal coatings during storage, transport, installation or operational use, to establish a consistent classification of indoor corrosivity and to provide for the deduction and estimation of procedural indoor corrosivity classes.

The scheme shown in Figure 1 gives a general method for classifying indoor atmospheric corrosivity.

FEIGE. 1 Classification scheme of indoor atmospheric low corrosion

FEIGE. 1 Classification scheme of indoor atmospheric low corrosion

1 Geltungsbereich
The document establishes a classification of low corrosive atmospheres in indoor environments.

It specifies the reference metal that is used to determine the corrosive class of the low corrosive indoor atmosphere after a specified exposure period of corrosion attack.

It defines the corrosive class of the indoor atmosphere in terms of corrosion erosion on standard samples.

It indicates the important parameters of indoor atmosphere, which can be used as the basis for estimating indoor corrosivity.

ISO 11844-2 gives the selection of methods for measuring corrosion, description of standard samples, exposure conditions and assessment. The measurement of environmental parameters affecting indoor corrosion is given in ISO 11844-3.

ISO 11844-1-2020 Korrosion von Metallen und Legierungen – Klassifizierung der geringen atmosphärischen Korrosion in Kammern – Teil 1: Bestimmung und Abschätzung der Korrosion in Kammern

2 Normative Referenzdokumente
There are no normative references in this document.

3 Begriffe und Definitionen
Für die Zwecke dieses Dokuments, Es gelten die folgenden Begriffe und Definitionen.

ISO und IEC unterhalten unter folgenden Adressen Terminologiedatenbanken zur Standardisierung:

– ISO-Online-Browsing-Plattform: iso.org/obp

– IEC-Elektropädie: verfügbar unter electropedia.org/

3.1 Climate

The statistics of temperature, Feuchtigkeit, Druck, wind, rainfall and other meteorological elements in a certain place over a long period of time

[Quelle: IN 15759-1:2011, 3.1]

3.2 Atmosphere

A mixture of gases, aerosols, and particles surrounding a given material, object, or structure

ISO 11844-1-2020 Korrosion von Metallen und Legierungen – Klassifizierung der geringen atmosphärischen Korrosion in Kammern – Teil 1: Bestimmung und Abschätzung der Korrosion in Kammern

3.3 Indoor Atmosphere

The environment [the combined influence of climate (3.1) and atmosphere (3.2)] is inside a box, room, or building

3.4 Microclimate

The climate (3.1) of a small area, a specific room, part of a building, usw., may differ from that of a general area

3.5 Temperature and Humidity Complex

Combined effects of temperature and relative humidity on atmospheric corrosivity (3.10)

[Quelle: ISO 9223:2012, 3.4]

3.6 Wet Time

The period in which the surface of a metal is covered by an adsorption film and/or liquid film of an electrolyte that can cause atmospheric corrosion

[Quelle: ISO 9223:2012, 3.5]

ISO 11844-1-2020 Korrosion von Metallen und Legierungen – Klassifizierung der geringen atmosphärischen Korrosion in Kammern – Teil 1: Bestimmung und Abschätzung der Korrosion in Kammern

3.7 Air Pollution

Specific corrosive active substances, gases or suspended particles in the air (natural and human activities)

3.8 Corrosion System

A system consisting of one or more metals and environmental components that affect corrosion

[Quelle: ISO 8044:2020, 3.4, geändert — Notiz 1 to the entry has been removed.]

3.9 Corrosion

The ability of the environment to cause metal corrosion in a given corrosion system (3.8)

[Quelle: ISO 8044:2020, 3.14]

ISO 11844-1-2020 Korrosion von Metallen und Legierungen – Klassifizierung der geringen atmosphärischen Korrosion in Kammern – Teil 1: Bestimmung und Abschätzung der Korrosion in Kammern

3.10 Atmospheric corrosiveness

The ability of the atmosphere to cause corrosion in a given corrosion system (3.8)

Beispiel: Atmospheric corrosion of a given metal or alloy.

[Quelle: ISO 9223:2012, 3.1, geändert – an example added.]

Nur der Standardinformationsbereich ist öffentlich. Um den vollständigen Inhalt zu sehen, Sie müssen den Standard über die offiziellen Kanäle erwerben.