ISO 9350:2025 PDF

Name: ISO 9350:2025 — Corrosion of metals and alloys — Testing method of corrosion resistance for hafnium at high temperature and pressure
SKU: ISO 9350:2025
Price: 25 EUR
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Corrosion of metals and alloys — Testing method of corrosion resistance for hafnium at high temperature and pressure

Название (английский):

ISO 9350:2025

Corrosion of metals and alloys — Testing method of corrosion resistance for hafnium at high temperature and pressure

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 11
Дата публикации:: 28 августа 2025 г.
Издание:: ISO IS 9350 edition 1 version 1
ICS:: 77.060

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Описание (английский):

This document specifies: a) the determination of mass gain; b) the surface inspection of products of hafnium when corrosion tested in water at 360 °C. This document is applicable to hot-work or cold-work hafnium rods, wires, plates, sheets and strips. This method has been widely used in the development of hafnium products. It is applicable for use in its entirety to the extent specified for a product acceptance test, rather than merely a means of assessing performance in service of pressurized water reactor.

Abstract

Похожие стандарты

Другие стандарты ISO

Overview

ISO 9350:2025 - Corrosion of metals and alloys - Testing method of corrosion resistance for hafnium at high temperature and pressure - defines a standardized laboratory method to evaluate hafnium corrosion in high-temperature, high-pressure water. The method specifies exposure at 360 °C and nominal 18.7 MPa for 672 hours, with corrosion assessed by mass gain and surface (oxide film) inspection. It applies to hot‑ or cold‑worked hafnium rods, wires, plates, sheets and strips and is intended for product acceptance testing as well as performance evaluation related to nuclear applications (e.g., pressurized water reactors).

Key topics and requirements

Test principle: Controlled autoclave exposure of hafnium specimens in water; primary metrics are mass gain and visual surface appearance.

Specimens: Individual identification, options for etched or as‑manufactured surfaces; guidance on coupon preparation (see Annex A).

Test conditions: Temperature 360 °C, test pressure ~18.7 MPa, duration 672 h (document allows contractor‑specified pressure variations as required).

Water quality: Grade A (≥ 1 MΩ·cm) or Grade B (≥ 0.5 MΩ·cm) purified/deionized water; only analytical‑grade reagents otherwise.

Reagents & gases: Etching involves acids (HF, HNO3); argon gas of high purity (999.9 ml/l) is referenced.

Apparatus: Autoclaves constructed from type 300 series stainless steel or specified nickel‑base alloys; equipment for precise measurement of mass (0.1 mg), dimensions (20 µm), temperature and pressure control.

Calibration & control: Use of control coupons to validate test runs; procedures for autoclave cleaning, calibration and venting methods.

Safety: Hazards from concentrated acids, high‑pressure/high‑temperature operations, and handling of hafnium products are highlighted; follow manufacturer and regulatory safety practices.

Applications and users

Primary applications: Product acceptance testing, quality control, material development and performance prediction of hafnium used as a neutron absorber in nuclear reactors.

Who uses it: Materials testing laboratories, nuclear component manufacturers, quality assurance engineers, R&D teams developing hafnium rods/plates/strips, and regulatory bodies overseeing nuclear materials.

Practical value: Provides consistent, repeatable criteria for comparing hafnium corrosion resistance across suppliers and labs and for verifying conformity to purchaser requirements.

Related standards

Prepared by ISO/TC 156 (Corrosion of metals and alloys). While ISO 9350:2025 contains no normative references, users commonly consult other ISO corrosion and materials test standards and national regulations for complementary procedures, safety and conformity assessment.

Keywords: ISO 9350:2025, hafnium corrosion test, high temperature high pressure, autoclave testing, mass gain measurement, control coupon, corrosion resistance, pressurized water reactor, specimen preparation.

ISO 9350:2025 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

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