| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1469969 | Corrosion Science | 2011 | 9 Pages |
The effect of different type of iron-phosphate coatings on corrosion stability and adhesion characteristic of top powder polyester coating on steel was investigated. Iron-phosphate coatings were deposited on steel in the novel phosphating bath with or without NaNO2 as an accelerator. The corrosion stability of the powder polyester coating was evaluated by electrochemical impedance spectroscopy (EIS), adhesion by pull-off and NMP test, while surface morphology of phosphate coatings were investigated by atomic force microscopy (AFM).The adhesion and corrosion stability of powder polyester coatings were improved with pretreatment based on iron-phosphate coating deposited from NaNO2-free bath.
► The effect of NaNO2 on surface morphology of iron-phosphate coatings were determined. ► Better corrosion stability of polyester coating on phosphated steel without NaNO2. ► EIS results and microscopic examinations correlate well with adhesion measurements.
