SIST EN 2334:2001

Aerospace series - Chromic-sulphuric acid pickle of aluminium and aluminium alloys

This standard specifies the acid chromate pickling of aluminium alloys except those with a silicon content in excess of 2% or a copper content in excess of 5%. It is applicable whenever referenced.

Luft- und Raumfahrt - Beizen von Aluminium und Aluminiumlegierungen in Chromschwefelsäure

Diese Norm legt das Beizen von Aluminium und Aluminiumlegierungen in Chromschwefelsäure fest. Legierungen mit einem Siliziumanteil über 2% oder einem Kupferanteil über 5% sind ausgenommen. Sie ist anzuwenden, wenn auf sie Bezug genommen wird.

Série aérospatiale - Décapage sulfochromique de l'aluminium et des alliages d'aluminium

La présente norme spécifie le décapage sulfochromique de l'aluminium et des alliages d'aluminium sauf ceux ayant une teneur en silicium supérieure à 2%, ou une teneur en cuivre supérieure à 5%. Elle doit être appliquée chaque fois qu'elle est citée en référence.

Aerospace series - Chromic-sulphuric acid pickle of aluminium and aluminium alloys

General Information

• Status: Published
• Publication Date: 31-Dec-2000
• ICS: 49.025.20 - Aluminium
• ICS: 49.040 - Coatings and related processes used in aerospace industry
• Technical Committee: SS SPL - Technical Board for the general field
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2001
• Due Date: 01-Jan-2001
• Completion Date: 01-Jan-2001
• Ref Project: EN 2334:1997 - Aerospace series - Chromic-sulphuric acid pickle of aluminium and aluminium alloys

Overview

SIST EN 2334:2001 is a European standard developed by CEN that specifies the process for chromic-sulphuric acid pickling of aluminium and aluminium alloys. This standard is part of the aerospace series and is designed to ensure consistent, high-quality surface treatment of aluminium materials used in aerospace applications. The standard applies specifically to aluminium alloys excluding those with silicon content over 2% or copper content exceeding 5%. It provides essential guidelines for manufacturers and engineers to achieve optimal surface cleanliness and prepare aluminium surfaces for subsequent coating or bonding processes.

Key Topics

• Chromic-Sulphuric Acid Pickling: EN 2334 outlines the formulation and controlled use of chromic-sulphuric acid solutions for pickling aluminium surfaces, a critical step to remove oxides and contaminants.
• Material Scope: Applicable to aluminium alloys with silicon content up to 2% and copper content up to 5%, aligning with aerospace industry requirements.
• Surface Preparation: The standard ensures that treated aluminium surfaces are adequately prepared for subsequent coating processes, enhancing adhesion and durability.
• Process Control and Safety: Emphasizes controlled process parameters and safety considerations due to the hazardous nature of chromic-sulphuric acid.
• Quality Assurance: Defines criteria for surface condition post-treatment to guarantee consistency in aerospace manufacturing.

Applications

SIST EN 2334:2001 is critical for industries using aluminium components where high performance and reliability are mandatory, such as:

• Aerospace Manufacturing: Preparation of structural aluminium alloys prior to coating, painting, or bonding in aircraft and spacecraft production.
• Aerospace Coatings: Enhances adhesion of protective and decorative coatings on aluminium parts, improving corrosion resistance and mechanical properties.
• Surface Treatment Providers: Standardizes procedures for external suppliers specializing in aluminium pickling and surface treatment within the aerospace supply chain.
• Research and Development: Used as a reference for developing new aluminium surface processing techniques in aerospace materials engineering.

Related Standards

• EN 1234 - Related surface treatment standards for aluminium alloys.
• ISO 4527 - General standards on pickling processes for metals.
• EN 9100 - Aerospace quality management systems impacting surface treatment controls.
• EN 12476 - Standards on coatings applied to aerospace aluminium alloys.
• Additional CEN and ISO standards related to aluminium alloy specifications and environmental handling of acid pickling processes.

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Keywords: SIST EN 2334:2001, aerospace aluminium pickling, chromic-sulphuric acid, aluminium alloys surface treatment, aerospace coatings, aluminium alloy preparation, aerospace industry standards, aluminium pickling process, corrosion protection aluminium, chromic acid aluminium cleaning

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Chromic-sulphuric acid pickle of aluminium and aluminium alloysLuft- und Raumfahrt - Beizen von Aluminium und Aluminiumlegierungen in ChromschwefelsäureSérie aérospatiale - Décapage sulfochromique de l'aluminium et des alliages d'aluminiumAerospace series - Chromic-sulphuric acid pickle of aluminium and aluminium alloys49.040Prevleke in z n
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