All products and parts used in the
aerospace industry have to be proven safe through rigorous testing and high
production standards. Aerospace parts from small fasteners to wire insulations
to fluid gaskets must stand up to demanding operating conditions for extended
periods of time.
Teflon™ coatings used in the aerospace
industry are highly specified, highly qualified, and resistant to a wide range
of stresses. They offer durability and toughness for an industry with unique
needs. Here we’ll review Teflon™ product lines commonly used in aerospace as
well as pertinent SAE standards and aerospace standards resources.
Teflon™
for Aerospace
The combination of many Teflon™ coating
properties make these coatings particularly robust for aerospace. Teflon™ PTFE and
FEP coating systems are among the most popular in the industry.
PTFE 851G-2XX and 852G-2XX are ideal systems for aerospace applications
requiring thermal stability and superior coefficient of friction. The acid primers
850G-204 and 850G-314 offer high
lubricity in a thin film. Acid primers are usually used under a PTFE Topcoat,
but the acid primer alone is useful in some applications such as fuel filter
screens.
FEP One Coats (954G-3XX and
959G-2XX) are also well-suited for aerospace because of their durability and
high service temperatures of up to 425° F. And the FEP system of 953G-506 (primer) and 953G-401 topcoat provides premium release
properties with good chemical resistance. Toilet bowls on airplanes are often
coated with this FEP system so the toilets use less water, planes carry less
water, and planes use less fuel.
Call Intech Services for more technical
details at 302-366-8530.
Common SAE
Standards:
- AMS2515H PTFE
Resin Coating, Low Build, 370 to 400 °C (698 to 752 °F) Fusion – This
specification establishes the engineering requirements for producing thin
coatings of PTFE (with acid primer) on parts and the properties of such
coatings.
- AS 9100D Quality
Management Systems – Requirements for Aviation, Space, and Defense
Organizations – This standard includes ISO
9001:2015 quality management system requirements and specifies additional
aviation, space, and defense industry requirements, definitions, and notes.
- AS12500 Corrosion
Prevention and Deterioration Control in Electronic Components and Assemblies – This
specification covers corrosion prevention and mitigation aspects in Avionics,
Electronics, and Electrical Wire Interconnect Systems. (Replaced MIL-HDBK-1250.)
- AS7489 Standard
Requirements for Aerospace Organic Coatings Applicator Certification – This
standard establishes the minimum requirements for training, examination, and
certification of aerospace coatings application personnel applying liquid
organic coatings to interior structural or exterior substrates.
Aerospace Coating Resources:
- Aerospace
Industries Association–The National
Aerospace Standards (NAS) are voluntary standards developed by the aerospace industry.
- Aerospace Standards Overview by ASTM – Compiled by
a number of ASTM International committees covering aircraft construction and
parts manufacturing.
- The Gardner-Sward Handbook – This “Paint
and Coating Testing Manual” is a valuable guide to standards of many national
and international organizations.
- IAQG-OASIS
Database – The Online Aerospace Supplier Information System (IAQG-OASIS) is a
reliable source for aerospace supplier certification and registration data.
- Nadcap
– Nadcap is the leading worldwide cooperative program
of major companies designed to manage a cost-effective consensus approach to
special processes and products and provide continual improvement within the
aerospace and defense industries. And here’s an FAQ Page on Nadcap
Accreditation by Boeing.
One common manufacturer’s specification
not listed is the Boeing BMS10-146 material specification, which outlines
application and performance requirements of Teflon™ 958G-203 One-Coat. This is not a
public standard, but one you should be aware of nonetheless.
