SIST EN ISO 16866:2023 PDF

Name: SIST EN ISO 16866:2023 — Metallic and other inorganic coatings - Simultaneous thickness and electrode potential determination of individual layers in multilayer nickel deposits (STEP test) (ISO 16866:2020)
SKU: SIST EN ISO 16866:2023
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Metallic and other inorganic coatings - Simultaneous thickness and electrode potential determination of individual layers in multilayer nickel deposits (STEP test) (ISO 16866:2020)

Название (английский):

SIST EN ISO 16866:2023

Metallic and other inorganic coatings - Simultaneous thickness and electrode potential determination of individual layers in multilayer nickel deposits (STEP test) (ISO 16866:2020)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 19
Дата публикации:: 25 ноября 2022 г.
Издание:: ISO 16866:2020
ICS:: 25.220.40

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Описание (английский):

This document specifies a method for measuring the thickness of the individual nickel layers in electroplated multilayer nickel coatings and measuring the potential differences between the individual nickel layers in electroplated multilayer nickel coatings. The measurement of coatings or layer systems other than electroplated multilayer nickel coatings is outside the scope of this document.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 16866:2022 (ISO 16866:2020) specifies the STEP test - Simultaneous Thickness and Electrode Potential determination - for electroplated multilayer nickel coatings. The standard defines a validated method to measure, in a single operation, the individual layer thicknesses and the electrode potential differences between layers in multilayer nickel deposits. Measurement of coatings other than electroplated multilayer nickel systems is explicitly outside the scope.

Key topics and technical requirements

Test principle: A modification of the coulometric (anodic dissolution) thickness measurement that records potential jumps against a reference electrode as each nickel layer dissolves.

Measuring cell designs: Two typical cell configurations are described - a silver wire coated with AgCl positioned at the cell edge, and a silver ring coated with AgCl at the cell base. Both give comparable uncertainty after calibration.

Instrumentation: Requires a measuring instrument with a constant-current source and voltmeter, appropriate pump/circulation for electrolyte and a stable reference electrode.

Accuracy factors: The standard addresses influences on measurement uncertainty, including electrolyte composition, conditioning, surface cleanliness, measurement area and contact pressure, electrical contact, and complete dissolution of layers.

Evaluation & reporting: Procedures for measurement, evaluation, uncertainty assessment and required elements in the test report are defined.

Practical benchmark values: The document notes common observed potential differences (e.g., ~80–150 mV for typical double nickel layers; ≳20 mV between bright nickel and special nickel layers), while not mandating fixed acceptance limits.

Normative references: Includes ISO 2177 (coulometric thickness measurement) and ISO 3696 (laboratory water quality).

Applications

Quality control of electroplated multilayer nickel systems in manufacturing (e.g., automotive, electronics, decorative and functional plating).

Corrosion assessment by determining potential differences that influence galvanic behavior between nickel layers.

Failure analysis and process troubleshooting where layer integrity or unexpected electrochemical behavior is suspected.

Contract and specification verification where documented layer thickness and interlayer potentials are required.

Related standards

ISO 2177 - Metallic coatings: Coulometric method by anodic dissolution (thickness)

ISO 3696 - Water for analytical laboratory use (quality of electrolyte)

EN ISO 16866:2022 supersedes EN 16866:2017 and is the adopted European version of ISO 16866:2020.

Keywords: EN ISO 16866:2022, STEP test, multilayer nickel deposits, nickel coatings, electrode potential, thickness measurement, coulometric method, electroplated nickel.

SIST EN ISO 16866:2023 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications

Who should use this standard

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