ISO 4526-2004 “Nickel electroplating for metal cladding engineering”

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ISO 4526 was developed by Technical Committee ISO/TC 107, Metallic and Other Inorganic Coatings, Subcommittee SC 3, Electrodeposited Coatings and Related Finishes.

The second edition cancelled and replaced the technically revised first edition (ISO 4526:1984).

ISO 4526-2004 “Nickel electroplating for metal cladding engineering”

Engineered nickel coatings are specified for a variety of applications, such as increased hardness, wear and corrosion resistance, load-bearing characteristics, heat and scale resistance, corrosion fatigue resistance, and other improvements in surface properties. Electrodeposited nickel is also used in engineering applications to rescue worn or improperly processed finished products and is used in combination with other metal coatings as a diffusion barrier. Engineered nickel coatings typically contain more than 99% nickel and are usually electrodeposited by addition-free solutions of watt or nickel sulfonate. Typical solution compositions, operating conditions, and mechanical properties of electrical deposits for these solutions are given in Appendix A.

Organic additive particles (such as silicon carbide, tungsten carbide, alumina, chromium carbide, and other substances) can be introduced into these solutions when it is necessary to increase hardness, improve wear resistance, modify stress values within the sediment, and enhance leveling characteristics. Sulfur-containing organic additives should be used to increase hardness and reduce residual internal stress only if the end use involves exposure to low or moderate temperatures. High temperature exposure of nickel coatings containing sulfur may lead to embrittlement and cracking of coatings. The effect is time-dependent and may become noticeable at 150°C if heated long enough.

One noteworthy trend is the increasing use of nickel alloy plating process in engineering applications. These include binary alloys of nickel with cobalt, iron, manganese, molybdenum, phosphorus and tungsten.

1 range
This standard specifies requirements for electroplated nickel and nickel alloy coatings of ferrous and non-ferrous base metals used for engineering purposes.

Binary nickel alloys where nickel is a minor component are excluded from the scope of this standard.

The designation provides a means of specifying the type and thickness of nickel and nickel alloy coatings suitable for engineering applications.

ISO 4526-2004 “Nickel electroplating for metal cladding engineering”

2 Normative references
The following reference documents are not available or available for use in this document. For dated references, citation-only versions apply. For undated references, the new version of the reference (including any revisions) applies.

ISO 1463, metallic and oxide coatings – Measurement of coating thickness – Microscopic method

ISO 2064, Metallic and other Inorganic coatings – Definitions and practices relating to thickness measurement

ISO 2079, Surface treatments and metallic Coatings – General classification of terms

ISO 2080, Electroplating and related processes — Vocabulary

– ISO 2177, metallic coatings – Measurement of coating thickness – anode dissolution Coulomb method

– ISO 2361, electrolytic nickel coatings on magnetic and non-magnetic substrates – Measurement of coating thickness – Magnetic methods

ISO 2819, Metallic Coatings on Metallic substrates – Electrodeposited and chemically deposited coatings – examines methods that may be used to test adhesion

ISO 3497, metallic coatings – Measurement of coating thickness – X-ray spectroscopy

– ISO 3543, metallic and non-metallic coatings – Measurement of thickness – beta backscattering method

– ISO 3882, Metallic and other Inorganic Coatings – Review of thickness measurement methods

ISO 4516, Metallic and other inorganic coatings — Vickers and Knower microhardness tests

– ISO 4519, Electrodeposited metallic coatings and associated finishes – Sampling procedure for inspection by attribute

– ISO 8401, Metallic Coatings – Review of ductility measurement methods

– ISO 9220, Metallic coatings – Measurement of coating thickness – scanning electron microscopy

– ISO 9587, Metallic and other inorganic coatings – Pretreatment of iron or steel to reduce the risk of hydrogen embrittance

– ISO 9588, Metallic and other Inorganic Coatings — Post-treatment of iron or steel coatings to reduce hydrogen embrittleness risk

ISO 10289, Corrosion test methods for metallic and other inorganic coatings on metallic substrates – Rating of specimens and finished products subjected to corrosion tests

ISO 10587, Metal and other inorganic coatings – Residual embrittlement test for metal-coated and uncoated external threaded articles and bars – inclined wedge method

– ISO 12686, Metallic and other inorganic coatings – Automatic controlled shot peening of metallic products prior to nickel, autocatalytic nickel or chromium plating or as a final finish

– ISO 15724, Metals and other inorganic coatings – Electrochemical measurement of diffusible hydrogen in steel – barnacle electrode method

EN 12508, Corrosion protection of metals and alloys – Surface treatment, metallic and other inorganic coatings – Vocabulary

3 Terms and Definitions
For the purposes of this document, the terms and definitions given in ISO 2064, ISO 2079, ISO 2080 and EN 12508 apply.

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