ISO 6743-8:1987

Overview

ISO 6743-8:1987 is an international standard developed by the International Organization for Standardization (ISO) that provides a detailed classification system for lubricants and related industrial oils, specifically focused on products designed for temporary protection against corrosion. This standard is part 8 of the series ISO 6743, which covers class L (Lubricants, industrial oils, and related products). It must be used in conjunction with ISO 6743-0, the general classification framework for this class.

The scope of ISO 6743-8:1987 includes only those products whose primary function is to provide temporary corrosion protection. The term "temporary" relates to the removability of the protective product after a certain period, rather than a limitation on the duration of protection. This standard excludes vapor-phase inhibitors and certain other chemical products that behave differently from petroleum-based products.

Key Topics

• Classification System: ISO 6743-8 uses a coding system to categorize temporary corrosion protection products. Each product category is identified by a "family" letter R (for temporary corrosion protection), followed by additional letters representing specific applications or formulations.

• Types of Protective Films: The standard includes products that leave different types of protective films such as:

  • Thin water-displacing films
  • Oily films
  • Waxy or dry films
  • Peelable films
  • Greasy films

• Product Applications:

  • Protection of bare metals and coated metals (e.g., painted metallic surfaces, car bodies)
  • Protection of ferrous and non-ferrous metals, including steel sheets, tubes, machined parts, aluminium, stainless steel, and plastic compounds

• Removal Methods: Emphasizes the removability of protective products using suitable solvents, water-based detergents, peeling, or wiping depending on the product formulation and application.

• Duty Conditions: Defines light-duty and more severe duty conditions based on factors such as storage duration, exposure to humidity, and corrosive atmospheres.

Applications

ISO 6743-8:1987 is essential for manufacturers, suppliers, and users of temporary corrosion protection products across various industries, including:

• Metalworking and Machining: Protecting machined and ground parts during storage and transport.

• Automotive and Mechanical Engineering: Temporary protection of vehicle parts, nuts, bolts, screws, mechanical assemblies, and heavy-duty machinery components.

• Metal Fabrication: Safeguarding steel sheets, plates, steel tubes, aluminium sheets, stainless steel, and coated metals throughout processing stages.

• Storage and Shipping: Ensuring protection of parts stored under varying conditions up to several months, even in sealed packages or controlled atmospheres.

• Painted Surfaces: Temporary protection of painted steel or coated metal surfaces often encountered in car bodies and assembled parts.

This standard supports practical corrosion prevention strategies by providing a clear framework to select and classify appropriate temporary protective lubricants and oils, minimizing surface deterioration without permanent residue.

Related Standards

• ISO 6743-0: General classification framework for lubricants and related products in class L.

• ISO 3448: Industrial liquid lubricants - ISO viscosity classification - This standard is referenced to define viscosity grades used in classification of corrosion prevention products.

• Other ISO Standards on Corrosion and Lubricants: For broader corrosion protection and lubricant performance classification, ISO has related standards addressing permanent corrosion inhibitors, lubricant testing methods, and industrial oil specifications.

Keywords: ISO 6743-8, temporary protection against corrosion, industrial lubricants, petroleum products, corrosion prevention, lubricant classification, petroleum-based corrosion inhibitors, metal protection, removable protective films, industrial oils, lubricant standards, ISO standards for corrosion