Metals are inherently vulnerable to corrosion due to environmental factors such as moisture, oxygen, pollutants, and biological agents that lead to gradual deterioration.

Conservation treatments ensures that historic metalwork is stabilized and preserved, restoring the integrity and appearance while respecting original finishes. This includes bronze, copper, cast iron, wrought iron, steel, aluminum, zinc, as well as gilded surfaces finished with gold and silver leaf, found in monuments, sculptures, doors, railings, domes, and decorative architectural elements.

Material testing and analysis and expertise in historic metalwork help identify the causes of deterioration and inform targeted treatment strategies. Conservators remove corrosion and contaminants using mechanical, chemical, or laser cleaning techniques selected for each material and condition. Protective coatings, corrosion inhibitors, regilding, and other specialized treatments are then applied to stabilize the metal and ensure its long-term preservation.