Surface treatment

More information about surface finishes

Roughness measurements of stainless steel surfaces

Surface roughness is a measure of the texture of a surface. It is quantified by the vertical deviations of a real surface from its ideal form. If these deviations are great, the surface is rough, if they are small, the surface is smooth. Roughness is typically considered to be high-frequency, short-wavelength component of a measured surface. In practice, it is often necessary to know both the amplitude and frequency to ensure that a surface is fit for purpose.

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Published: 5/1/2016
Last modified: 5/1/2016

Surface Hardening of Stainless Steels

This brochure describes the various processes used to harden stainless steel surfaces and the properties typically obtained.

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Published: 15/12/2015
Last modified: 15/12/2015

Guide to Stainless Steel Finishes

The purpose of this Euro Inox Guide is to:

  • show to the architect and designer the wide range of possible surfaces at his/her disposal
  • provide more detail on the processes involved
  • provide basic technical advice on their application

This guide is available in English, Czech, Dutch, Finnish, French, German, Italian, Polish, Spanish, Swedish and Turkish [clicking on the language will open a pdf]

Published: 23/11/2015
Last modified: 23/11/2015

Depth, Pattern and Texture The Third Dimension in Stainless Steel Surfaces

When choosing a material, architects are increasingly looking not only at functional performance but also at less quantifiable characteristics, such as aesthetic effect, colour and texture, all of which have an important effect on the final result. This goes hand in hand with advances in manufacturing processes which are opening up new possibilities. This Euro Inox brochure highlights some of the possibilities and gives many examples of where three-dimensional surface structures were used and how they are created.

This brochure is available in English, Czech, Dutch, Finnish, French, German, Italian, PolishSpanish, Swedish and Turkish [clicking on the language will download a pdf]

Published: 23/11/2015
Last modified: 23/11/2015

Electropolishing Stainless Steels

Electropolishing is a chemical surface-finishing technique, by which metal is electrolytically removed, ion by ion, from the surface of a metal object. This Euro Inox brochure explains the process in more detail.

The brochure is available in English, Czech, Dutch, Finnish, French, German, Hungarian, Italian, Polish, Spanish, Swedish and Turkish [clicking on the language will open a pdf].

Published: 23/11/2015
Last modified: 23/11/2015

Surface Finishes

Summary of the main surface finish designations and comments on where they might be appropriate.

Source: Southern Africa Stainless Steel Development Association

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Published: 8/5/2012
Last modified: 8/5/2012

Pickling and Passivating Stainless Steel

This resource describes the surface treatments known as pickling and passivation that can be applied to stainless steel. Pickling uses nitric and hydrofluoric acids to remove a thin layer of metal from the surface.  Passivation uses nitric acid to improve the quality and thickness of the passive layer on the surface. Procedures for removing weld heat tint and rust contamination are explained.

This brochure is available in Czech, Dutch, English, German, Finnish, French, Polish, Spanish, Swedish and Turkish [clicking on the language will download the pdf].

Published: 8/5/2012
Last modified: 8/5/2012

The Mechanical Finishing of Decorative Stainless Steel Surfaces

This document discusses the following points:

  • Specifying mechanically finished surfaces for stainless steel fabrications
  • Frequently used finishing methods
  • Frequently used abrasives and power tools
  • Best practice finishing
  • Case studies
  • Health, safety and environmental issues

This brochure is available in Czech, Dutch, English, German, Finnish, French, Italian, Polish, Spanish, Swedish and Turkish [clicking on the language will download the pdf]

Published: 8/5/2012
Last modified: 8/5/2012

SSINA Handbook on Finishes

Colorful illustrations throughout this free Designer Handbook provide a sampling of the customized, special finishes for stainless steel available in today's marketplace. Learn about etched, embossed, rolled, colored, and other special finishes, and where you can find them through the handbook's Directory of Representative Suppliers.

Source: Specialty Steel Industry of North America

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Published: 8/5/2012
Last modified: 8/5/2012

Paint Coating Stainless Steels

Stainless steels are used because of their corrosion resistance in a wide variety of service environments, usually without additional coatings. In certain circumstances, however, stainless steel components or structures may require a coated (paint) finish. Examples of this may include company colour schemes or logos, environmental blending and compatibility, and general aesthetic requirements.

Source: British Stainless Steel Association

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Published: 8/5/2012
Last modified: 8/5/2012

Galling and Galling Resistance of Stainless Steel

Galling (cold welding) is a form of severe adhesive wear. The mechanism is briefly described. Methods for reducing galling tendency are discussed and include lubrication, nitriding and hard chromium plating.

Source: British Stainless Steel Association

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Published: 8/5/2012
Last modified: 8/5/2012

Use of Hydrofluoric Acid in Scale Removal etc

Hydrofluoric acid is an aggressive substance used in the stainless steel industry, usually to assist in removal of scale and the chrome depleted layer associated with welds. This ASSDA technical bulletin outlines changes to drugs and poisons schedules and state-by-state contacts on the subject in Australia.

Source: Australian Stainless Steel Development Association

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Published: 8/5/2012
Last modified: 8/5/2012

Dos and Donts in Selecting and Specifying Stainless Steel Surface Finishes

This paper, presented at the IOM workshop, So You Want to Build it in Stainless Steel, firstly outlines mill and mechanically polished (brushed) finishes to EN 10088 part 2. It goes on to discuss patterned finishes, bead-blasted finishes and electropolished finishes in a wide range of applications.

Source: British Stainless Steel Association

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Published: 8/5/2012
Last modified: 8/5/2012

Stainless Steel Surface Treatment

This explains about method and application of basic surface treatment briefly. Attached pictures are interesting. Because they show the appearance which things reflect on each surface.

Source: POSCO

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Published: 8/5/2012
Last modified: 8/5/2012

Pickling and Passivation

Stainless steel can corrode in service if there is contamination of the surface. Both pickling and passivation are chemical treatments applied to the surface of stainless steel to remove contaminants and assist the formation of a continuous chromium-oxide, passive film. Pickling and passivation are both acid treatments and neither will remove grease or oil. If the fabrication is dirty, it may be neccesary to use a detergent or alkaline clean before pickling or passivation.

Source: Australian Stainless Steel Development Association

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Published: 7/5/2012
Last modified: 7/5/2012