увод
ИСО (Међународна организација за стандардизацију) је глобална федерација националних тела за стандардизацију (Тела чланица ИСО). Развој међународних стандарда се обично спроводи преко ИСО техничких комитета. Свака група чланова заинтересована за предмет за који је формиран технички комитет има право да буде заступљена у комисији. Међународне организације, владе и невладине организације у контакту са ИСО такође су укључене у овај посао. ИСО блиско сарађује са Међународном електротехничком комисијом (ИЕЦ) о свим питањима електричне стандардизације.

Парт 1 of the ISO/IEC Directive describes the procedures used to develop this document and for further maintenance. Нарочито, треба обратити пажњу на различите критеријуме одобрења који су потребни за различите типове ИСО докумената. This document has been drafted in accordance with the editorial rules of ISO/IEC Directive Part 2 (види исо.орг/дирецтивес).

Имајте на уму да неки елементи овог документа могу бити предмет патентних права. ИСО није одговоран за идентификацију било ког или свих таквих патената. 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 (see 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.

ИСО 22858-2020 – Electrochemical measurement of Corrosion of metals and alloys – Test method for monitoring atmospheric corrosion

Explanations of the relevant standards of voluntary, ISO specific terms related to conformity assessment and the expression of meaning, and the ISO in the technical barriers to trade (ТБТ) adhere to the principle of the world trade organization (WTO) information, please refer to the iso.org/iso/foreword.html.

This document has been prepared by the ISO/TC 156 Technical Committee on Corrosion of Metals and Alloys.

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.

увести
The purpose of this document is to provide instructions on the use of electrochemical sensors to monitor atmospheric corrosion. These sensors are used for long-term measurement of thin film electrolyte conductance, corrosion current or coating condition. This method allows real-time assessment of corrosion currents associated with specific environmental conditions. Instantaneous corrosion current measurements cannot be obtained using resistance sensors or mass loss techniques. The techniques described in this document complement other standard techniques for assessing atmospheric corrosion, such as mass loss test sheets, resistance sensors or coating test plates (see ISO 8407 и ИСО 4628-8). These continuous records of material conditions can be used to study atmospheric corrosion, evaluate materials, or manage assets. [21][22][23][24][25][26][27][28][29]

ИСО 22858-2020 – Electrochemical measurement of Corrosion of metals and alloys – Test method for monitoring atmospheric corrosion

This document is based on ANSI/NACE TM0416-2016.

This document is relevant to alloy and coating manufacturers as well as users in transport, chemical process, energy and infrastructure applications.

1 Обим примене
This document specifies a test method for atmospheric corrosion measurement using a two-electrode electrochemical sensor.

It is suitable for measuring the corrosion rate of uncoupled metal surfaces (тј. the “free” corrosion rate), the galvanic corrosion rate, the conductivity of film solutions and the barrier properties of organic coatings. It specifies electrochemical sensors with or without the use of organic coatings. These sensors are suitable for corrosion measurements in laboratory test rooms, outdoor exposure sites and service environments.

2 Нормативни референтни документи
When the following documents are referenced in the text, some or all of them constitute the requirements of this document. За датиране референце, примењује се само наведена верзија. За цитате без датума, нову верзију наведеног документа (укључујући све ревизије) примењује.

ИСО 4618, paints and varnishes – Terms and definitions

ИСО 4628 (all parts), paints and varnishes – Assessment of coating degradation – designation of number and size of defects, and intensity of uniform changes in appearance

ИСО 8044, Корозија метала и легура – Vocabulary

ИСО 22858-2020 – Electrochemical measurement of Corrosion of metals and alloys – Test method for monitoring atmospheric corrosion

ИСО 9223, Корозија метала и легура – corrosion of the atmosphere – classification, determination and estimation

3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4618, ИСО 4628 (all parts), ИСО 8044, ИСО 9223 and the following apply.

ISO and IEC maintain terminology databases for standardization at the following addresses:

– ИСО платформа за претраживање на мрежи исо.орг/обп

– ИЕЦ Елецтропедиа: доступно на елецтропедиа.орг/

3.1 Resistance Sensor

A device for measuring corrosion, including measuring the ratio of an electric potential difference along a conductor to the current passing through it

Article Note 1: ИСО 15091:2019, 3.1 defines “resistance” as “the ratio of the potential difference along a conductor to the current passing through it.”

ИСО 22858-2020 – Electrochemical measurement of Corrosion of metals and alloys – Test method for monitoring atmospheric corrosion

3.2 Electrochemical Sensor

A device for measuring corrosion involving anode and cathode reactions

Белешка 1: ИСО 8044:2020, 4.1 defines “electrochemical corrosion” as “corrosion involving at least one anode reaction and one cathode reaction”.

3.3 Number of Electrodes

Single finger of interdigital electrode (3.5)

3.4 Corrosion Penetration

The distance between the corroded surface and the original surface of the metal

Белешка 1: ИСО 8044:2020, 3.11 defines “corrosion depth” as “the distance between a point on the surface of the metal affected by corrosion and the original surface of the metal”.

3.5 Interfinger electrodes

Electronic conductors that interlock like fingers

ИСО 22858-2020 – Electrochemical measurement of Corrosion of metals and alloys – Test method for monitoring atmospheric corrosion

3.6 Sensor Range

Upper and lower limit measurements

3.7 Sensor Span

The difference between the maximum and minimum measurements

3.8 Solution resistance

The ratio of the electrode potential increment to the corresponding current increment depends on the solution

3.9 Film conductance

Current transfer capacity of solution layer

Article Note 1: ИСО 15091:2019, 3.3 defines “conductance” as “the reciprocal of resistance”.

3.10 Zero-resistance ammeter

An instrument for measuring the current between two electrodes without potential drop

Јаван је само одељак са стандардним информацијама. Да бисте видели цео садржај, морате купити стандард преко званичних канала.