ISO 16691-2014 PDF

Full title and description

Space systems — Thermal control coatings for spacecraft — General requirements. ISO 16691:2014 specifies general requirements for thermal control coatings (TCC) applied to metallic and non‑metallic surfaces of spacecraft and payloads to provide and maintain thermo‑optical properties such as solar absorptance (αs) and emittance (ε) for temperature regulation of spacecraft.

Abstract

ISO 16691:2014 defines the purpose, performance characteristics and general requirements for thermal control coatings used on spacecraft. The standard addresses the required thermo‑optical properties at beginning‑of‑life (BOL) and their maintenance through end‑of‑life (EOL), and notes environmental degradation mechanisms (UV, charged particles, atomic oxygen) relevant to TCC selection and specification.

General information

• Status: Published (confirmed international standard).
• Publication date: February 2014 (Edition 1, published February 2014).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 49.140 (Space systems and operations); 49.025.01 (Materials for aerospace construction in general).
• Edition / version: Edition 1 (2014).
• Number of pages: 17 (approx.).

Scope

ISO 16691:2014 applies to thermal control coatings used on spacecraft surfaces and payloads to provide specified thermo‑optical properties—principally solar absorptance (αs) and thermal emittance (ε)—and to maintain required behaviour during the mission. It covers general performance requirements, design and selection considerations, and references relevant test and measurement practices for qualification and acceptance of TCCs.

Key topics and requirements

• Definition and functional role of thermal control coatings (TCC) in spacecraft thermal control systems (TCS).
• Thermo‑optical properties to be specified and measured: solar absorptance (αs) and emittance (ε) at relevant temperatures and geometries.
• Requirements for BOL performance and criteria for acceptable EOL degradation (life‑cycle considerations).
• Environmental durability considerations: effects of UV radiation, charged particles and atomic oxygen on coating performance and erosion.
• Compatibility with substrate materials, adjacent coatings and spacecraft systems (including contamination and electrostatic/discharge concerns).
• Reference to normative test methods and related standards for sample preparation, application and property measurement.

Typical use and users

Typical users include spacecraft thermal‑control engineers, materials and coatings manufacturers, spacecraft integrators, procurement and quality assurance teams, and test laboratories. The standard is used to specify coating requirements in contracts and technical specifications, to guide coating selection during spacecraft design, and to support qualification and acceptance testing of TCCs.

Related standards

Standards and documents commonly referenced alongside ISO 16691 include other ISO standards developed by ISO/TC 20/SC 14 addressing thermal control materials and testing (for example ISO 23129 on atomic‑oxygen protective coatings, ISO 23230 on coatings processes and requirements, and newer/related environmental testing standards for TCMs such as ISO 15104). ISO 16691 also cross‑references materials and test standards (examples: ISO 14624‑3 and ISO 9117‑1) used for off‑gassing and coating drying tests.

Keywords

thermal control coatings; TCC; spacecraft coatings; solar absorptance; emittance; thermo‑optical properties; BOL; EOL; atomic oxygen; UV degradation; ISO/TC 20/SC 14.

FAQ

Q: What is this standard?

A: ISO 16691:2014 is an international standard that sets general requirements for thermal control coatings used on spacecraft to achieve and maintain thermo‑optical properties such as solar absorptance and emittance.

Q: What does it cover?

A: It covers the functional role of thermal control coatings, the thermo‑optical properties to be specified (αs and ε), expectations for beginning‑of‑life performance and end‑of‑life behaviour, and guidance on environmental durability and relevant test references.

Q: Who typically uses it?

A: Spacecraft thermal engineers, coatings manufacturers, test laboratories, procurement and QA teams, and systems integrators use the standard for specification, selection, qualification and acceptance of spacecraft coatings.

Q: Is it current or superseded?

A: ISO 16691:2014 is a published international standard (Edition 1, 2014) that has been reviewed and listed as confirmed in ISO’s review cycle; it remains current in its confirmed form.

Q: Is it part of a series?

A: ISO 16691 sits within the ISO/TC 20/SC 14 portfolio of space systems and operations standards addressing thermal control materials and coatings; related documents address specific coating types, testing and processes (for example ISO 23129, ISO 23230, and environmental testing standards).

Q: What are the key keywords?

A: Key keywords include thermal control coatings, TCC, solar absorptance (αs), emittance (ε), spacecraft, BOL, EOL, atomic oxygen, UV degradation, thermo‑optical properties.