Anticorrosive Performance of Zinc Phosphate Coatings on Mild Steel Developed Using Galvanic Coupling
Figure 4
The corrosion behaviour of phosphated mild steel substrates under coupled and uncoupled conditions subsequently finished with a paint coating (DFT: 50 μm) after subjecting them to salt spray test for 96 hours. (a) Mild steel under uncoupled condition. (b) Mild steel coupled with stainless steel (area ratio 1 : 3). (c) Mild steel coupled with nickel (area ratio 1 : 3). (d) Mild steel coupled with brass (area ratio 1 : 3). (e) Mild steel coupled with copper (area ratio 1 : 3). (f) Mild steel coupled with titanium (area ratio 1 : 3).
