IEC 60068-2-52:2017

Overview

IEC 60068-2-52:2017 - Environmental testing - Part 2-52: Tests - Test Kb: Salt mist, cyclic (sodium chloride solution) - is an international standard that specifies cyclic salt mist (salt spray) procedures to evaluate how components and equipment perform in salt-laden atmospheres. The third edition (2017) replaces the 1996 edition, has been harmonized with ISO 9227, and introduces significant updates such as a dry chamber, new test methods, and improved reporting requirements.

Key topics and technical requirements

This standard covers the full test program and apparatus requirements for cyclic corrosion testing with a sodium chloride solution. Major technical topics include:

• Test objectives: Assess corrosion and degradation on metallic and non‑metallic materials caused by salt-laden atmospheres.
• Cyclic test conditions: Defined sequences combining salt mist, humid, dry, and standard atmosphere phases to better simulate natural cyclic environments.
• Test apparatus: Requirements for salt mist chambers, humidity chambers, standard atmosphere chambers and the newly included dry chamber; Annex A provides a typical apparatus example.
• Salt solution preparation: Procedures for preparing, filtering and adjusting the pH of sodium chloride solutions (neutral or acidified).
• Test methods: Eight test methods are defined (test methods 1–8), reflecting different cyclic severities and exposure combinations; Annex B describes each method.
• Pre‑ and post‑test procedures: Initial measurements, preconditioning, removal, recovery and final measurements of test specimens.
• Documentation and reporting: Updated requirements for information to be included in the test report and in relevant product specifications.
• Harmonization and normative references: Content aligned with ISO 9227 and updated normative references.

Practical applications and users

IEC 60068-2-52 is used to evaluate durability and corrosion resistance in industries where salt exposure is a concern, including:

• Electronics and electrical equipment - connectors, enclosures, PCBs, and outdoor devices.
• Automotive and marine components - fasteners, coatings, sensors and structural parts.
• Telecommunications and infrastructure - base stations, cabinets and outdoor installations.
• Coating and materials manufacturers - verification of protective coatings, plating and material selection.

Typical users: test engineers, product designers, quality managers, materials scientists, and certification bodies who need standardized cyclic salt mist procedures for product validation, specification writing, and comparative testing.

Related standards

• ISO 9227 - Neutral salt spray (NSS) test (harmonized as far as possible with IEC 60068-2-52).
• Other parts of the IEC 60068 series on environmental testing (for broader environmental test planning and selection).

Keywords: IEC 60068-2-52, salt mist cyclic test, salt spray, cyclic corrosion testing, sodium chloride solution, environmental testing, corrosion testing, ISO 9227.