kromoinnilla

Kromoinnilla is the Finnish term for chrome plating, a surface finishing process in which a thin layer of chromium is deposited on a metal substrate to improve hardness, wear resistance and appearance. The term is used in Finnish industry and trade to refer to both decorative and functional chrome coatings.

The usual process involves thorough cleaning and pretreatment of the substrate, immersion in an electrolytic chromium bath, and the application of an electrical current to drive chromium ions onto the surface. Decorative chrome typically produces bright, smooth finishes with relatively thin coatings, while hard chrome coatings are thicker and harder, intended to boost wear resistance and fatigue life. Historically, hexavalent chromium baths were common, but due to toxicity and environmental concerns, many facilities now use trivalent chromium baths or alternative coating technologies. Post-deposition steps may include polishing, sealing or passivation.

Properties and limitations: Chromium coatings provide high surface hardness, low friction in some cases, good corrosion resistance and a distinctive metallic sheen. They require compatible base metals and proper maskings; plating thickness and adhesion influence performance. Environmental and safety considerations: Chromic plating processes involve hazardous substances; workplaces use ventilation, protective equipment and waste treatment; regulations often restrict hexavalent chromium use and encourage safer technologies.

Applications: Kromoinnilla is used on automotive trim, fasteners, tools, plumbing fittings, bicycle parts, aerospace components, and decorative hardware.

See also: Chrome plating, electroplating, hard chrome, decorative chrome, chromium.