Zinc dialkyl dithiophosphate (ZDDP) serves as a critical anti-wear additive in automotive and industrial lubricants, providing protection to engine components and machinery. Under high temperatures and high load areas where sliding motion occurs, ZDDP forms a protective film on metal surfaces that significantly reduces friction and prevents direct metal-to-metal contact. This characteristic makes it particularly suitable for automotive and industrial applications where heavy loads and extreme pressure are common.