ISO 11997-1-2017 PDF

Full title and description

Paints and varnishes — Determination of resistance to cyclic corrosion conditions — Part 1: Wet (salt fog)/dry/humid. This international standard specifies a laboratory method to assess the resistance of organic and inorganic coatings (paints and varnishes) to cyclic corrosive environments consisting of sequential wet (salt fog), drying and humid phases.

Abstract

ISO 11997-1:2017 defines one of the ISO cyclic corrosion test procedures used to evaluate coating performance under repeated salt-fog/wet, dry and high-humidity cycles. The standard provides four normative cycles (representative of different field conditions), prescribes the composition and quality of salt solutions, sets out cabinet and spray requirements, and describes sample preparation, exposure procedures and reporting requirements. Evaluation criteria and acceptance limits are not fixed by the standard and are normally agreed between the interested parties.

General information

• Status: Published
• Publication date: August 2017
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 87.040 — Paints and varnishes
• Edition / version: Edition 3 (2017)
• Number of pages: 14

Scope

ISO 11997-1:2017 applies to the laboratory determination of the resistance of coatings on test panels to defined cyclic corrosion exposures that combine wet (salt fog), drying and humid periods. The standard is intended for comparative and development testing (quality control and R&D) and specifies four alternative, normative cyclic schedules to reflect different service or regional conditions. The standard focuses on test method and apparatus requirements; specific pass/fail criteria are to be agreed between supplier, purchaser or other stakeholders.

Key topics and requirements

• Definition of four normative cyclic exposure schedules (different national/industry variants representing realistic field exposures).
• Specification and preparation of salt-fog test solutions (analytical-grade salts, limits on impurities, and required water quality per ISO 3696).
• Apparatus and cabinet design requirements (spray/nozzle arrangement, salt deposition control, specimen racks, humidity and temperature control, drainage and drip prevention).
• Test panel preparation: substrate, coating application and drying/conditioning, film thickness and scribe preparation for adhesion/corrosion assessment.
• Exposure procedure: sequence of wet/dry/humid phases, control and monitoring of environmental parameters, filtration of solutions to avoid nozzle blockage.
• Examination, evaluation and reporting: agreed evaluation criteria, required test report content, and precision/reproducibility considerations.

Typical use and users

Used by coatings manufacturers, independent testing laboratories, automotive and industrial OEMs, component suppliers and R&D teams to compare formulations, validate corrosion protection systems, and support product specifications and procurement agreements. Laboratories offering cyclic corrosion testing adopt this standard for method definition while contractual acceptance criteria are set by stakeholders.

Related standards

ISO 11997 is a multi-part series — other parts address different exposure combinations (for example, ISO 11997-2 for wet/dry/humid plus UV light). Equivalent or complementary corrosion/accelerated weathering methods commonly referenced alongside ISO 11997-1 include ASTM salt spray and cyclic methods (for example ASTM B117 and ASTM G85) and various national/adopted EN versions (EN ISO 11997-1:2017). Users often cross-reference test methods when defining performance requirements.

Keywords

cyclic corrosion, salt fog, salt spray, coatings, paints, varnishes, wet/dry/humid cycles, corrosion testing, test cabinet, evaluation, ISO 11997

FAQ

Q: What is this standard?

A: ISO 11997-1:2017 is an international test method for determining the resistance of coatings to cyclic corrosion conditions made up of wet (salt fog), dry and humid phases; it is part 1 of the ISO 11997 series and was published in August 2017.

Q: What does it cover?

A: It covers the procedure, apparatus and solution requirements for exposing coated test panels to one of four defined cyclic routines (wet/salt fog, drying and humidity), plus requirements for sample preparation, monitoring, examination and reporting. Acceptance criteria are not prescribed by the standard and must be agreed between parties.

Q: Who typically uses it?

A: Coatings and paint manufacturers, independent test laboratories, automotive and industrial OEMs, suppliers and R&D groups use the standard for development, quality control and comparative performance testing.

Q: Is it current or superseded?

A: ISO 11997-1:2017 is the current published edition that superseded earlier editions (for example the 2005 edition). Users should check ISO or their national standards body for any updates or revisions beyond 2017.

Q: Is it part of a series?

A: Yes — ISO 11997 is a multi-part series addressing cyclic corrosion test variants (for example, Part 2 covers cycles that include UV light). Related national and EN-adopted versions exist for harmonized use in different regions.

Q: What are the key keywords?

A: Cyclic corrosion, salt fog, wet/dry/humid, coatings testing, paints and varnishes, accelerated corrosion, test cycles, cabinet design.