(n.) Gradual decay; rusting\; the action or effect of corrosive agents, or the process of corrosive change; as, the rusting of iron is a variety of corrosion.

ablation atomization attrition biodegradability biodegradation breakup consumption corruption crumbling decay decomposition decrement degradability degradation deliquescence depletion dilapidation disintegration disjunction disorganization dissipation dissolution erosion exhaustion incoherence loss mildew mold oxidation oxidization ravages of time resolution rust shrinkage spoilage waste wear wear and tear