Slitage

Slitage is a term used in several Scandinavian languages to denote wear and tear: the gradual deterioration that occurs in an object through use, aging, or exposure to the environment. It describes the normal, expected decline in performance or condition as a result of routine use, rather than sudden damage from an accident or defect. In engineering, maintenance, and asset management, slitage is considered when estimating remaining useful life, planning service intervals, and determining replacement schedules.

Causes of slitage include friction and contact between surfaces, material fatigue from loading cycles, corrosion, and environmental factors such as humidity and temperature. Types of wear associated with slitage include mechanical wear (abrasive, adhesive, and fatigue wear), surface wear, and chemical or environmental wear. Slitage can be assessed through inspections, non-destructive testing, measurements of wear depth, and monitoring performance indicators such as efficiency or noise. Remaining life models and condition-based maintenance rely on understanding slitage patterns.

Management aims to minimize slitage through proper lubrication, appropriate materials and coatings, design choices that reduce stress concentrations, and regular maintenance. Distinguishing slitage from damage is important: damage refers to abnormal, unintended harm due to accidents, misuse, or defects, while slitage is the expected outcome of normal use.

Slitage has implications for warranties, insurance, and accounting, where wear affects value and serviceability but is not necessarily a fault. In everyday language, slitage is the wear seen on vehicles, machinery, clothing, and infrastructure.