Overview
EN ISO 22553-1:2020 / ISO 22553-1:2019 defines the vocabulary for electro‑deposition coatings (e‑coats). This part of the ISO 22553 series standardizes terms and abbreviated forms used across cathodic and anodic electro‑deposition coating processes, helping ensure consistent communication in industry, testing, procurement and technical documentation. It is applicable to automotive and other industrial applications (chiller units, radiators, consumer products, aerospace, agriculture).
Key topics and definitions
This vocabulary standard provides precise definitions for core electro‑deposition coating concepts, including:
- Electro‑deposition coating material (e‑coat) - aqueous coating materials suitable for electrophoretic deposition.
- Cathodic / Anodic e‑coating process - distinction based on whether the workpiece is the cathode or anode.
- Deposition voltage / deposition time - voltage applied and duration required to obtain a specified film thickness.
- Density of volume charge - electrical charge per unit volume (important for process energy considerations).
- Throwing power - ability of an e‑coat to penetrate box sections.
- Stoving / stoving loss - heat‑initiated curing and the volatile losses during bake.
- Common defects and terms - pinholes, craters (flores), mapping (local thickness differences), hashmarks, entry marks.
- Stability - resistance of the bath and formulation to ageing, evaporation and microbial contamination.
- Rupture voltage - voltage above which deposition becomes uncontrollable.
Annex A of the document maps vocabulary to the corresponding test methods in the ISO 22553 series (e.g., throwing power ISO 22553‑2, entry marks ISO 22553‑6) and references related test standards (e.g., conductivity ISO 15091, bacterial count ISO 23321).
Practical applications
Standardized terminology in EN ISO 22553‑1 supports:
- Clear technical specifications and procurement documents for automakers, OEMs and suppliers.
- Consistent reporting and interpretation of quality control and laboratory test results.
- Harmonized communication between R&D, formulation chemists, process engineers and test houses.
- Regulatory and conformity assessment work where unambiguous definitions are required.
Who should use this standard
- Paint and varnish manufacturers and formulators (e‑coat producers)
- Automotive and industrial coating engineers
- Quality assurance and laboratory personnel performing e‑coat testing
- Standards writers, procurement teams and technical authors
Related standards
Using EN ISO 22553‑1 ensures consistent, industry‑wide terminology for electro‑deposition coatings, improving clarity in specification, testing and process control.