Step 2 Phosphating The metal is treated with phosphoric acid, leading to the following two reactions occuring in the zinc-rich surface of the steel: 2H3PO4 + 3Zn → 3H2 + Zn3(PO4)2 2H3PO4 + Fe + 2Zn → 3H2 + FeZn2(PO4)2 This gives a mixture of zinc phosphates. The electrocoat paint binds better to these zinc phosphates than to the steel alone, and the zinc phosphates corrode much slower than the ...

in a greenhouse experiment, changes in inorganic phosphorus fractions as well as their availability in the rhizosphere of rice (oryza sativa c.v. khazar) crop, following an application of 40 mg p (as monocalcium phosphate per kg of soil) were investigated in paddy soils north of iran. the study was performed as a 14×2 factorial in a completely randomized design of two factors namely: soil at 14...

Anaerobic soil conditions resulting from flooding often enhance release of phosphorus (P) to overlying water. Enhanced P release is well documented for flooded acidic soils; however, there is little information for flooded alkaline soils. We examined the effect of flooding and anaerobic conditions on P mobilization using 12 alkaline soils from Manitoba that were either unamended or amended with...

Abstract. Phosphorus in the environment is mostly bound with iron, magnesium, calcium, and aluminum (Fe, Mg, Ca, and Al, respectively). This study aimed to determine both spectral signatures of Fe, Mg, Ca, and Al associated phosphates and analyze their spectra with soil samples. Obtaining most common spectra of the phosphates and their spectral signatures within a soil sample can be used for de...

Hollow magnetic Fe3O4@NH2-MIL-101(Fe) derived from metal-organic frameworks are fabricated through a general facile strategy. The synthetic parameters are regulated to control the shape of the as-prepared samples. The concentration of phosphates decreased sharply from the initial 0.60 to 0.045 mg.L(-1) with the exposure time in 50 minutes. The correlation between the most significant parameters...

In a high mountain lake and catchment area, a natural process of phosphorus enrichment is observed, induced by the iron-cycle. Investigations focus on the speciation of P and Fe in iron and manganese rich oxidic mineral crusts formed at the surface of rock pebbles. Iron and phosphorus are spatially associated although they are not forming iron phosphate minerals. While Fe and P K edge XAS spect...