Complex analysis of the quality of the nickel layer of screws.

Result code in IS VaVaI

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Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Complex analysis of the quality of the nickel layer of screws.

Original language description

Chemical nickel plating is one of the functional coatings that extend the life of coated components. This type of coating has wide application, enables coated complex shape components, holes and edges. The procedure electro less nickel has several steps and consists of degreasing, rinsing, pickling (eg. Hydrochloric acid), rinsing, and insert into the nickel bath. Nickel coatings do not form pure nickel, but it is a phase of NiP, NiB, NiCoP, etc. The thickness and quality of the layer depends on the purity of the object, and the time of stamina the concentration in the bath. Follow by removal from the bath, rinsing and drying. The coating has a hardness of about 550 HV, given that it is an alloy coating nickel-phosphorus can be achieved by heat treatment hardness of 1000 HV. Chemical nickel coating is universal coating that their properties coated component simultaneously provides corrosion resistance, abrasion resistance and good sliding properties. The coatings exhibit a constant thickness across the plating surface, regardless of its geometry. In most common applications are used in coating thickness 25 ?m, a thickness of 25 to 80 ?m are used for the parts with a higher the risks to corrosion and the thickness of 80 ?m for the repair of wear parts and the like. The aim of the paper was to analyse the quality of the nickel layer of screws of free-cutting steel, which are part of the fuel system of cars. Nickel coating of steel parts is carried out with the aim of extending the life of components. Any degradation of the layer results in deterioration of not only of screws, but also the whole. Layers will be evaluated using a microscopic methods and hardness measurements. The results will determine the causes of changes in the quality of the nickel layer and a determined of general and specific recommendations for the formation of the nickel layer.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JK - Corrosion and material surfaces

OECD FORD branch

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Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Engineering for Rural Development, Proceedings

ISBN

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ISSN

1691-5976

e-ISSN

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Number of pages

6

Pages from-to

1212-1217

Publisher name

Latvia University of Agriculture Faculty of Engineering

Place of publication

Jelgava, Latvia

Event location

Jelgava

Event date

May 25, 2016

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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