TS EN 4902

TS EN 4902 is a vocabulary standard for the aerospace surface-treatments field. It gathers the terms and definitions to be used in documents related to surface treatments, and it provides a common language for test methods that can be referenced by surface-treatment standards. In practice, this helps make technical communication more consistent across coatings, anodizing, conversion coatings, cleaning processes, and related surface-engineering activities.

Why terminology matters in surface treatment

In aerospace and space applications, surface treatments are often critical to corrosion resistance, wear performance, adhesion, and sometimes electrical behavior. Clear definitions matter because the same process family may be described differently across organizations, suppliers, and standards. In general technical context, a vocabulary standard does not introduce a new coating process; it organizes the language used to describe existing processes so that requirements, records, and specifications can be understood in the same way.

What this standard covers

• Definitions intended for use in documents dealing with surface treatments
• Common terminology for test methods that surface-treatment standards may reference
• Shared language for aerospace coatings and related processes
• A definition set that supports consistent use of terms across documents

This document is not a full process specification. Its value lies in defining the conceptual framework and reducing ambiguity in technical documentation. When a specific coating system or surface-treatment requirement is needed, users would normally consult the relevant application standard; TS EN 4902 supports those standards by stabilizing the terminology used within them.