ISO 22910:2020 PDF

Name: ISO 22910:2020 — Corrosion of metals and alloys — Measurement of the electrochemical critical localized corrosion temperature (E-CLCT) for Ti alloys fabricated via the additive manufacturing method
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Corrosion of metals and alloys — Measurement of the electrochemical critical localized corrosion temperature (E-CLCT) for Ti alloys fabricated via the additive manufacturing method

Название (английский):

ISO 22910:2020

Corrosion of metals and alloys — Measurement of the electrochemical critical localized corrosion temperature (E-CLCT) for Ti alloys fabricated via the additive manufacturing method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 10
Дата публикации:: 6 августа 2020 г.
Издание:: ISO IS 22910 edition 1 version 1
ICS:: 77.060

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Описание (английский):

This document specifies procedures for testing the resistance to localized corrosion of Ti alloys fabricated via additive manufacturing (AM) method. This document regulates the electrochemical critical localized corrosion temperature (E-CLCT) of the AM Ti materials for a comparative evaluation of resistance to localized corrosion.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 22910:2020 - Corrosion of metals and alloys: Measurement of the electrochemical critical localized corrosion temperature (E-CLCT) for Ti alloys fabricated via the additive manufacturing (AM) method - specifies a laboratory procedure to evaluate localized corrosion resistance of AM titanium alloys. The standard defines E-CLCT as the lowest surface temperature at which stable localized corrosion (pitting and crevice) initiates under specified electrochemical test conditions. It was developed because conventional CPT/CCT tests for wrought or cast alloys do not reliably characterize the localized-corrosion behavior of additively manufactured Ti materials (for example, Ti‑6Al‑4V and CP‑Ti).

Key topics and technical requirements

Test principle: potentiostatic temperature scan - hold an anodic potential constant while ramping specimen surface temperature and monitor current for a rapid increase that indicates E-CLCT.

Test solution: concentrated sodium chloride (mass fraction 25 %) is specified to create an aggressive environment appropriate for AM Ti alloys.

Specimen immersion: the whole AM specimen is immersed in the cell (flushed-port cells are not adequate); a crevice former is not used because AM-induced pores and interlayer edges act as initiation sites.

Apparatus highlights:

Potentiostat capable of controlling electrode potential to within ±1 mV; current measurement accuracy of about ±2%.
Recirculating heating bath able to generate 0 °C–100 °C with controller and a temperature ramp rate of 1 °C/min for surface temperature increase.
Specimen holders and connections designed to avoid parasitic corrosion at electrical contacts.

Scope & limitations: intended for comparative evaluation of AM heats, process variables and heat treatments; can be adapted for other AM alloys (e.g., Ni alloys) by changing solution concentration or applied potentials.

Applications and who uses it

ISO 22910:2020 is practical for:

Materials and corrosion engineers assessing AM Ti‑alloy batches and process parameter effects.

Quality control and qualification labs in aerospace, biomedical, marine and automotive sectors that use AM Ti parts.

R&D groups evaluating heat-treatment effectiveness, interlayer bonding integrity and porosity-related corrosion susceptibility.

Standards committees and testing laboratories extending electrochemical test methods to other AM alloys or to studies of corrosion cracking and erosion-corrosion.

Related standards

ISO 17864 - Critical pitting temperature (CPT) tests (useful for stainless steels; limited for AM Ti).

ISO 18089 / ISO 18098 - Critical crevice temperature (CCT) tests for wrought/cast alloys; limitations for AM Ti are noted. ISO 22910:2020 complements these by addressing the specific electrochemical and microstructural characteristics of additively manufactured titanium alloys.

Keywords: ISO 22910:2020, E‑CLCT, additive manufacturing, AM Ti alloys, Ti‑6Al‑4V, localized corrosion, potentiostatic temperature scan, corrosion testing standards.

ISO 22910:2020 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and who uses it

Related standards

Технические детали

SIST EN ISO 17864:2008

Corrosion of metals and alloys - Determination of the critical pitting temperature under potientiostatic cont…

BS ISO 18089:2015

Corrosion of metals and alloys. Determination of the critical crevice temperature (CCT) for stainless steels…

SIST EN ISO 18098:2022

Thermal insulating products for building equipment and industrial installations - Determination of the appare…