предговор
ИСО (Међународна организација за стандардизацију) је глобални савез националних тела за стандардизацију (Тела чланица ИСО). Развој међународних стандарда се обично спроводи преко ИСО техничких комитета. Свака институција чланица заинтересована за предмет за који је основан технички комитет има право да буде заступљена у тој комисији. Међународне владине и невладине организације које су у вези са ИСО такође су укључене у овај посао. ИСО блиско сарађује са Међународном електротехничком комисијом (ИЕЦ) о свим питањима електротехничке стандардизације.

Процедуре које се користе за израду овог документа и оне које се користе за даље одржавање описане су у Делу 1 ИСО/ИЕЦ директиве. Нарочито, обратите пажњу на различите стандарде одобрења који су потребни за различите типове ИСО докумената. Овај документ је израђен у складу са правилима уређивања у Дел 2 ИСО/ИЕЦ директиве (види исо.орг/дирецтивес).

Please note that certain contents of this document may be subject to patent rights. ИСО није одговоран за идентификацију било ког или свих таквих патената. Details of any patent rights identified during the preparation of the document will be in the introduction and/or list of patent claims received by ISO (see iso.org/patents).

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The committee responsible for this document is ISO/TC 156, Corrosion of Metals and Alloys.

ИСО 18069-2015 “Корозија метала и легура — Method for determining uniform corrosion rates of stainless steel and nickel-based alloys in liquids”

увести
Stainless steel and nickel-based alloys generally have good corrosion resistance, but uniform corrosion occurs in acidic and alkaline solutions. Uniform corrosion rates in aqueous solutions are generally considered to be a fairly stable process as long as the corrosive environment is constant in terms of chemical composition, температура, and flow conditions. Стога, uniform corrosion resistance of stainless steel and nickel-based alloys is usually determined by short-term laboratory sample immersion tests conducted under controlled conditions. Међутим, in practical applications, the conditions of service may change somewhat, which may result in temporary activation of the surface of stainless steel or nickel-based alloys. Changes in temperature, fluctuations in air or other oxidants, exposure to less valuable materials (such as mild steel) or certain cleaners are all factors that may lead to activation in some cases.

Стога, an important property to be studied is the ability of the material to passivate after activation, so the method includes activation of the sample. The corrosion rate determined by this test can be used as a basis for material selection and material life estimation.

1 домет
This standard specifies the expected corrosion rate of uniform corrosion of stainless steel and nickel-based alloys in liquids and the ability of materials to passivate after activation.

The method is intended to be used to estimate uniform corrosion rates of liquids under atmospheric conditions, chemical industry under specific environmental conditions, and not as a qualification test. It can also be used to determine isoetch graphs and temperatures where corrosion rates exceed 0.1mm /a.

This standard does not apply to excessive corrosion rates exceeding 1 mm/a, as higher corrosion rates indicate that stainless steel is not suitable for application.

This standard does not apply to solutions containing halides, especially chlorides, which may cause localized corrosion.

2 Normative references
All or part of the following documents are referred to normatively in this document and are not available for their use. За датиране референце, only the quoted version applies. For undated references, the latest version of the reference applies.

ИСО 3696, Analytical laboratory water – specifications and test methods

ИСО 8044, Корозија метала и легура – Basic terms and definitions

ИСО 17864, Корозија метала и легура – Determination of critical corrosion temperature under potentiostatic control

3 Terms and Definitions
For the purposes of this document, the terms and definitions given in ISO 8044 apply.

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