Microstructural characterization and surface properties of zinc phosphated medium carbon low alloy steel

Deposition of zinc–zinc phosphate composite coatings on aluminium by cathodic electrochemical treatment

“…Flis et al [24] have identified the formation of needle-like crystals on Zn and Zn-Ni coated steel immersed in dilute sodium phosphate solution and confirmed that they are indeed zinc containing phosphates. The formation of a needle-like morphology is also observed by Arun Kumar et al [25] and Banczek et al [26] for zinc phosphate coating deposited on steel and by Morks et al [27] for MnMgZn phosphate coating deposited on steel. Zeng et al [28] have observed flowerlike morphological features for the Zn-Ca phosphate conversion coatings deposited on AZ31 Mg alloy.…”

“…According to Banczek et al [26,29], it could change from a needle-like to a granular morphology with the addition of niobium, ammonium oxalate and benzotrizole. Arun Kumar et al [25] have observed a change in morphology of the phosphate coating from a needle-like to plate-like character with an increase in volume fraction of the hopeite phase and a corresponding decrease in phosphophyllite and Zn 4 Fe 5 (PO 4 ) 6 ·4H 2 O phase. In the present study, an increase in current density from 10 to 40 mA/cm 2 is likely to promote the reduction of Zn 2+ ions and hence, the resultant coating is likely to be enriched with Zn.…”

Comparison of the thermal stability of magnesium phosphate (newberyite) coating with conventional zinc phosphate (hopeite) coating

“…These coatings form a suitable anchor profile for different systems of organic coatings and prolong the overall life of corrosion protection. This is achieved primarily because the treatment provides long-term protection from corrosion to the organic coating [2][3][4][5][6].…”

Effects of Hydroxylamine Sulfate and Sodium Nitrite on Microstructure and Friction Behavior of Zinc Phosphating Coating on High Carbon Steel

“…The influence of lubricants has been investigated on the friction behavior of zinc phosphated coatings in terms of physical-chemical interactions between lubricant and phosphate. Farias et al [12] and Kumar et al [13] also presented an in-depth investigation of the influence of process parameters on zinc phosphating of medium carbon steel and found that the phosphate needles in phosphating coatings reduced the wear resistance, making the friction coefficient increase and the hardness of the phosphate layer reduce. Lazzarotto et al [14] investigated the effects of processing bath parameters on the quality and performance of zinc phosphate stearate coatings.…”