Pinnoitekoko

Pinnoitekoko refers to the thickness of a coating applied to a substrate, a critical parameter in manufacturing and materials engineering. The term is used in Finnish technical literature and industry to describe protective, decorative, or functional coatings such as paints, electroplated layers, polymer coatings, and hard coatings (PVD/CVD) on metals, ceramics, or composites. The measured thickness depends on the coating type, process, and service requirements, and is often specified in design documents and quality-control specs.

Thickness is typically measured in micrometres (µm) or nanometres (nm) for thin films. Non-destructive metrology uses magnetic induction or eddy current methods for metallic substrates, X-ray fluorescence (XRF) for many inorganic and organic coatings, and optical or interferometric profiling for transparent coatings. When higher accuracy is needed or for complex geometries, cross-sectional microscopy or microsectioning may be used.

Coating thickness affects corrosion resistance, wear resistance, optical appearance, insulation, and adhesion. Uniform thickness across complex geometries is important; deviations can indicate process issues.

Industry standards and supplier specifications guide pinnoitekoko measurement and control. Measurements are often part of quality control, manufacturing traceability, and service life predictions.

Pinnoite means coating; koko means size or dimension in Finnish; together they denote the thickness of a coating. The term's usage varies by context and discipline.