The Corrosion Inhibitor segmentation by application delineates five principal end‑use categories that collectively drive market dynamics. Oil & Gas accounts for roughly 35% of total revenue, reflecting the sector’s extensive pipeline networks and offshore platforms where inhibitor performance directly impacts operational safety and downtime costs. Power Generation contributes about 25%, as thermal and nuclear plants rely on water‑based cooling systems that demand continuous inhibitor dosing to protect heat exchangers and condensers. Marine represents 20% of the market, covering ship hulls, offshore structures, and ballast water systems where salt‑water exposure accelerates metal degradation. Construction holds 12%, encompassing concrete reinforcement, structural steel, and underground utilities that require corrosion‑mitigating admixtures during building phases. Finally, Automotive accounts for the remaining 8%, primarily in cooling‑system fluids and brake‑line treatments where inhibitor stability under temperature cycling is critical. Each segment’s share is proportional to its asset base, regulatory pressure, and the frequency of inhibitor replenishment, thereby shaping the overall market size.