SIST EN ISO 16048:2004
(Main)Passivation of corrosion-resistant stainless-steel fasteners (ISO 16048:2003)
Passivation of corrosion-resistant stainless-steel fasteners (ISO 16048:2003)
ISO 16048 specifies the methods most often used for passivation of corrosion-resistant stainless steel fasteners.
Typical anodic dissolution behaviour of an active-passive-transpassive metal is given in an annex.
Passivierung von Verbindungselementen aus nichtrostenden Stählen (ISO 16048:2003)
Diese Internationale Norm legt die am häufigsten angewendeten Verfahren zur Passivierung von Verbindungselementen aus nichtrostendem Stahl fest.
Das typische anodische Lösungsverhalten von Aktiv-passiv-transpassiv-Metall wird im informativen Anhang A
gezeigt.
Passivation des éléments de fixation en acier inoxydable résistant a la corrosion (ISO 16048:2003)
L'ISO 16048:2002 spécifie les méthodes utilisées le plus souvent pour la passivation des éléments de fixation en acier inoxydable résistant à la corrosion.
Un comportement type de dissolution anodique d'un métal actif/passif/transpassif est donné dans une annexe.
Pasiviranje veznih elementov iz nerjavnega jekla (ISO 16048:2003)
General Information
- Status
- Published
- Publication Date
- 31-Dec-2003
- Technical Committee
- ISEL - Mechanical elements
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Jan-2004
- Due Date
- 01-Jan-2004
- Completion Date
- 01-Jan-2004
Overview
EN ISO 16048:2003 - "Passivation of corrosion-resistant stainless‑steel fasteners" specifies the common chemical methods used to passivate stainless‑steel fasteners. The standard describes preparatory pickling steps, recommended passivation baths, and verification responsibilities. An informative annex illustrates typical anodic dissolution behaviour (active → passive → transpassive) to explain the metallurgical basis for passivation and passivity.
Key topics and requirements
- Scope: Methods most often used for passivation of corrosion‑resistant stainless‑steel fasteners.
- Preparation: Fasteners must be degreased and rinsed before pickling. For some hot‑forged grades, the standard requires soft annealing and shot‑peening prior to pickling to reduce hydrogen embrittlement risk.
- Pickling: ISO 16048 recommends specific pickling baths with defined acid types, concentration, temperature and exposure time ranges to remove scale and surface contamination before passivation.
- Passivation baths: Primary passivation treatments use nitric acid (HNO3) baths in prescribed concentration and temperature ranges. The standard also permits the use of nitric acid with sodium dichromate (Na2Cr2O7·2H2O) additions to minimize discoloration or etching on high‑carbon and free‑cutting stainless steels.
- Verification: There is no single referee test method defined in the standard; passivation effectiveness must be confirmed through the manufacturer’s quality assurance system and in accordance with customer or product requirements.
- Technical background: Annex A explains anodic dissolution and the transition between active, passive and transpassive regions - important for understanding why passivation improves corrosion resistance.
Practical applications
- Ensuring long‑term corrosion resistance of stainless‑steel bolts, nuts, screws, studs and similar fasteners used in automotive, marine, construction, petrochemical and food‑processing industries.
- Establishing process control for manufacturers and surface treatment suppliers who perform pickling and passivation.
- Informing procurement and quality teams on specification and acceptance criteria for purchased fasteners.
- Guiding corrosion engineers and maintenance teams when selecting treated fasteners for corrosive environments.
Who should use this standard
- Fastener manufacturers and heat‑treatment shops
- Surface treatment and passivation service providers
- Quality assurance and inspection teams in manufacturing and supply chains
- Engineers specifying corrosion‑resistant fasteners
Related standards
- ISO 3506 series (mechanical properties of corrosion‑resistant stainless‑steel fasteners): Part 1 (bolts, screws, studs), Part 2 (nuts), Part 3 (set screws). These are normative references within EN ISO 16048:2003.
Keywords: EN ISO 16048:2003, passivation, stainless‑steel fasteners, corrosion‑resistant, pickling, nitric acid, sodium dichromate, passivity, anodic dissolution, manufacturer quality assurance.
Frequently Asked Questions
SIST EN ISO 16048:2004 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Passivation of corrosion-resistant stainless-steel fasteners (ISO 16048:2003)". This standard covers: ISO 16048 specifies the methods most often used for passivation of corrosion-resistant stainless steel fasteners. Typical anodic dissolution behaviour of an active-passive-transpassive metal is given in an annex.
ISO 16048 specifies the methods most often used for passivation of corrosion-resistant stainless steel fasteners. Typical anodic dissolution behaviour of an active-passive-transpassive metal is given in an annex.
SIST EN ISO 16048:2004 is classified under the following ICS (International Classification for Standards) categories: 21.060.01 - Fasteners in general. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN ISO 16048:2004 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2004
Pasiviranje veznih elementov iz nerjavnega jekla (ISO 16048:2003)
Passivation of corrosion-resistant stainless-steel fasteners (ISO 16048:2003)
Passivierung von Verbindungselementen aus nichtrostenden Stählen (ISO 16048:2003)
Passivation des éléments de fixation en acier inoxydable résistant a la corrosion (ISO
16048:2003)
Ta slovenski standard je istoveten z: EN ISO 16048:2003
ICS:
21.060.01 Vezni elementi na splošno Fasteners in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 16048
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2003
ICS 21.060.01
English version
Passivation of corrosion-resistant stainless-steel fasteners (ISO
16048:2003)
Passivation des éléments de fixation en acier inoxydable Passivierung von Verbindungselementen aus
résistant à la corrosion (ISO 16048:2003) nichtrostenden Stählen (ISO 16048:2003)
This European Standard was approved by CEN on 2 January 2003.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16048:2003 E
worldwide for CEN national Members.
CORRECTED 2003-03-19
Foreword
This document (EN ISO 16048:2003) has been prepared by Technical Committee ISO/TC 2
"Fasteners" in collaboration with Technical Committee CEN/TC 185 "Threaded and non-threaded
mechanical fasteners and accessories", the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2003, and conflicting national standards shall
be withdrawn at the latest by August 2003.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg,
Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 16048:2003 has been approved by CEN as EN ISO 16048:2003 without any
modifications.
NOTE Normative references to International Standards are listed in Annex ZA (normative).
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this European Standard only when incorporated in it by amendment or revision. For undated
references the latest edition of the publication referred to applies (including amendments).
NOTE Where an International Publication has been modified by common modifications, indicated by
(mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 3506-1 1997 Mechanical properties of corrosion- EN ISO 3506-1 1997
resistant stainless-steel fasteners -
Part 1: Bolts, screws and studs
ISO 3506-2 1997 Mechanical properties of corrosion- EN ISO 3506-2 1997
resistant stainless-steel fasteners -
Part 2: Nuts
ISO 3506-3 1997 Mechanical properties of corrosion- EN ISO 3506-3 1997
resistant stainless-steel fasteners -
Part 3: Set screws and similar
fasteners not under tensile stress
INTERNATIONAL ISO
STANDARD 16048
First edition
2003-02-01
Passivation of corrosion-resistant
stainless-steel fasteners
Passivation des éléments de fixation en acier inoxydable résistant à la
corrosion
Reference number
ISO 16048:2003(E)
©
ISO 2003
ISO 16048:2003(E)
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