By name, the difference is that one prevents corrosion and the other prevents rust; they serve different roles. With the national 'oil-to-water' policy, water-based industrial coatings gain room to grow. Anti-rust paint mainly protects metal surfaces from atmospheric and seawater corrosion, in two categories: physical (pigment+binder form a dense film blocking corrosive ingress, e.g., iron-red, aluminum, graphite) and chemical (rust-inhibitive pigments like red lead, zinc yellow). Used on bridges, ships, pipelines. Physical rust pigments are chemically stable, hard, fine, with good filling that raises film density and lowers permeability; iron oxide red is one, and aluminum flake's scale structure makes a tight film with strong UV reflection, raising aging resistance. Anti-corrosion paint is common in industry for surfaces against corrosion, widely used in aviation, ships, chemicals, oil pipelines, steel structures, bridges and offshore platforms; it withstands harsh conditions with good durability and weather resistance - 10-15 years even in marine/underground, 5+ years in acid/alkali/salt/solvent at certain temperatures. Anti-corrosion paint must not be applied on rust - clean the metal first, then coat.