ISO 14679-1997 PDF

Full title and description

St ISO 14679-1997 — ISO 14679:1997 — Adhesives — Measurement of adhesion characteristics by a three‑point bending method. This International Standard specifies a laboratory test method using a three‑point bending arrangement to evaluate the ability of a cured adhesive (with or without a primer) to adhere to a rigid substrate or to a substrate stiffened to resist bending for quality‑assurance purposes.

Abstract

This standard describes specimen preparation, substrate/adhesive assembly and a three‑point bending test procedure used to assess adhesion characteristics of cured adhesives on substrates that are sufficiently rigid (for example steel or aluminium alloys). The method is intended for quality control and is not suitable for film adhesives; where necessary the adhesive is allowed to cure to a thickness providing sufficient rigidity or a bonded reinforcing piece is used.

General information

• Status: Published (International Standard, confirmed in periodic reviews).
• Publication date: September 1997 (1997-09).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 83.180 (Adhesives).
• Edition / version: Edition 1 (1997).
• Number of pages: 11 pages.

Scope

The scope covers a laboratory three‑point bending test method for determining the adhesion performance of cured adhesives on substrates with a defined surface finish or preparation. It applies to quality‑assurance testing of adhesives bonded to substrates that are rigid or made effectively rigid by thickness or added stiffeners (examples: steel, aluminium). The procedure excludes use for thin film adhesives that cannot be made sufficiently rigid for the test. The method allows use of primers where required by the adhesive system.

Key topics and requirements

• Preparation of substrate and adhesive specimens, including surface finish and any prescribed surface treatment.
• Assembly procedure for bonding adhesive between substrate and, where necessary, a reinforcing block to obtain appropriate rigidity.
• Three‑point bending test setup, span selection, loading rate and data to be recorded (observations of failure mode, force/displacement behaviour).
• Use of primers where applicable and guidance on curing before testing.
• Limitations: intended for rigid substrates and quality assurance; not suitable for adhesive films that cannot be made rigid for the test.

Typical use and users

Typical users include adhesives manufacturers and formulators, materials testing laboratories, quality assurance engineers, R&D groups evaluating adhesive/substrate systems, and anyone specifying acceptance tests for adhesive bonding to rigid substrates in industrial applications. The method is mainly used for routine quality control and comparative evaluations rather than in‑service structural qualification.

Related standards

This test method sits among other ISO test standards for adhesives and bonded joints. Related or nearby standards include other ISO adhesives test methods such as ISO 14615 (durability of structural adhesive joints — exposure to humidity and temperature under load) and adjacent ISO adhesives standards addressing durability and joint performance. Users often apply this method together with material and environmental exposure standards when assessing long‑term joint behaviour.

Keywords

adhesives; adhesion; three‑point bending; bonded joints; substrate preparation; primer; adhesion test; quality assurance; ISO 14679; adhesive test method.

FAQ

Q: What is this standard?

A: ISO 14679:1997 is an International Standard that specifies a three‑point bending laboratory test method to measure adhesion characteristics of cured adhesives on rigid substrates for quality‑assurance purposes.

Q: What does it cover?

A: It covers specimen preparation, substrate and adhesive assembly (including allowance for primers or a reinforcing block), the three‑point bending test arrangement, test execution and the types of results and failure modes to observe. It is not suitable for thin adhesive films that cannot be rendered rigid for the test.

Q: Who typically uses it?

A: Adhesives manufacturers, materials testing laboratories, R&D and quality control engineers, and specifiers who need a standardized laboratory method to compare or control adhesive bonding to rigid substrates.

Q: Is it current or superseded?

A: As published in September 1997 (Edition 1), ISO 14679:1997 remains a published International Standard and has undergone periodic review/confirmation in ISO's lifecycle process (the ISO record shows review and confirmation activity). Users should check ISO's catalogue or national standards bodies for the very latest status before relying on the standard for contractual work.

Q: Is it part of a series?

A: It forms part of the family of ISO test methods and standards addressing adhesives and bonded joint performance (ICS 83.180) and is commonly used alongside other ISO adhesives standards that address durability and environmental exposure.

Q: What are the key keywords?

A: Adhesives, adhesion, three‑point bending, bonded joint testing, substrate preparation, primer, quality assurance, ISO 14679.