Oily or oxidized metal substrates (e.g., steel structures) often cause incomplete wetting. An agricultural machinery plant reported 40% cratering on welds, requiring manual respray at ￥120/unit extra cost.
Chemi Tech's wetting agent KMP-303 innovates with:
Dual-adsorption groups: Oleophobic chains remove oil films, hydrophobic segments penetrate oxides, cutting contact angles from 75° to 15°;
Rapid diffusion: Low MW (<500Da) ensures full weld coverage within 3 seconds;
Foam control: Balanced foam suppression prevents spray-induced craters.
Case: Heavy Machinery Coating Upgrade
Producing hydraulic supports with complex welds, this plant eliminated leveling lines after adopting KMP-303:
Application: 0.4% in primer, spray pressure reduced from 200Bar to 150Bar;
Results:
Weld craters dropped from 40% to 3%, edge coverage increased 35%;
Film thickness variation narrowed from ±15μm to ±5μm;
Respray rate decreased 50%, saving ￥2.8M annually.
Now achieving 98% first-pass yield on container corrugated panels.