ISO 4527:2003

Name: ISO 4527:2003 — Metallic coatings — Autocatalytic (electroless) nickel-phosphorus alloy coatings — Specification and test methods
SKU: ISO 4527:2003
Price: 39600 RUB
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Metallic coatings — Autocatalytic (electroless) nickel-phosphorus alloy coatings — Specification and test methods

Название (английский):

ISO 4527:2003

Metallic coatings — Autocatalytic (electroless) nickel-phosphorus alloy coatings — Specification and test methods

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 22
Дата публикации:: 16 мая 2003 г.
Издание:: ISO IS 4527 edition 2 version 1
ICS:: 25.220.40

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Цена:39 600 ₽

Описание (английский):

ISO 4527:2003 specifies the requirements and test methods for autocatalytic nickel-phosphorus alloy coatings applied from aqueous solutions on to metallic substrates. This International Standard does not apply to autocatalytic nickel-boron alloy coatings, nickel-phosphorus composites and ternary alloys.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 4527:2003 - Metallic coatings - Autocatalytic (electroless) nickel‑phosphorus alloy coatings - Specification and test methods - defines requirements and test methods for autocatalytic (electroless) nickel‑phosphorus coatings deposited from aqueous solutions onto metallic substrates. The standard covers designation, required information to be supplied to the coater, performance requirements and accepted test methods. It explicitly excludes autocatalytic nickel‑boron, nickel‑phosphorus composites and ternary alloys.

Key topics and technical requirements

Scope and exclusions: Applies to electroless nickel‑phosphorus coatings only; not for nickel‑boron or composite/ternary coatings.

Designation and documentation: Specifies how to designate basis metal, coating type, phosphorus level, thickness and heat treatments on drawings and purchase orders.

Performance characteristics and tests:

Coating thickness (microscopic, coulometric, X‑ray, beta/backscatter methods) - Annex B provides guidance.
Hardness (Vickers/Knoop) and wear resistance; heat treatment options to harden the coating (Annex A).
Adhesion and porosity tests; sampling procedures for inspection (ISO 4519 referenced).
Corrosion resistance (e.g., salt‑spray and rating methods).
Solderability and chemical composition (phosphorus analysis methods in Annex D).
Hydrogen embrittlement: pre/post‑treatment and relief heat‑treatment requirements for ferrous substrates.

Phosphorus content effects: As stated in the standard, deposits may contain up to ~14% mass fraction phosphorus. Corrosion resistance generally improves at ≥8% phosphorus, while as‑deposited wear resistance generally improves below that level; heat treatment can significantly increase hardness for high‑P deposits.

Information to purchaser/coater: Essential items include coating designation, substrate condition, heat‑treatment needs, sampling/acceptance criteria, thickness and measurement methods, and any under/overcoats.

Applications

ISO 4527 is used where uniform, corrosion‑resistant and wear‑resistant coatings are required on complex or irregular parts. Typical sectors:

Aerospace and defense (corrosion protection, precision components)

Automotive and powertrain (wear parts, fasteners)

Oil & gas and marine (corrosion mitigation)

Tooling and molding (wear resistance, solderability)

Electronics and instrumentation (uniform thin coatings)

Who should use this standard

Coating suppliers and plating shops implementing electroless nickel‑phosphorus processes

OEMs and procurement engineers specifying coatings on drawings and contracts

Quality and test laboratories performing thickness, hardness, adhesion, porosity and corrosion tests

Design engineers selecting surface finishes for corrosion and wear performance

ISO 4527:2003

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications

Who should use this standard

Related standards

Технические детали

ISO 45:1990

Aircraft — Pressure refuelling connections

ISO 4516:2002

Metallic and other inorganic coatings — Vickers and Knoop microhardness tests

BS EN ISO 9227:2017

Corrosion tests in artificial atmospheres. Salt spray tests

ISO 3497:1976

Metallic coatings — Measurement of coating thickness — X-ray spectrometric methods

BS ISO 28597:2017

Acceptance sampling procedures by attributes. Specified quality levels in nonconforming items per million.