A Zn-Sn coating of ~30 µm thickness was prepared on an iron substrate by mechanical deposition using zinc and tin powders as raw materials. The consists powder particles physically stacked with filled reduced tin, the content in is 20%–30%. resulting characterized analyzed scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), diffraction (XRD), polarization curves (Tafel),...

Hardening of invertebrate jaws and mandibles has been previously correlated to diverse, potentially complex modifications. Here we demonstrate directly, for the first time, that Zn plays a critical role in the mechanical properties of histidine-rich Nereis jaws. Using nanoindentation, we show that removal of Zn by chelation decreases both hardness and modulus by over 65%. Moreover, reconstituti...

For commercial applications, specially formulated conversion coating treatments based on chromates and phosphates have been used extensively to prevent rapid Zn dissolution in aerospace, food processing and automobile industries. Chromate coatings are favored due to their barrier and corrosion resistance properties. Chromium deposition is obtained from hexavalent Cr salt baths, which are subjec...

Zirconium (Zr) is an important alloying element to Mg-Zn-based alloy system. In this paper, we report the formation of the β-type precipitates on the nanoscale Zr-rich particles in a Mg-6Zn-0.5Cu-0.6Zr alloy during ageing at 180°C. Scanning transmission electron microscopy examinations revealed that the nanoscale Zr-rich [0001]α rods/laths are dominant in the Zr-rich core regions of the as-quen...

Designing Advanced High-Strength Steels assumes fine-tuning of alloying elements to enhance performance properties. This affects the kinetics Fe-Zn interaction during further galvannealing. A key role here belongs inhibition layer at steel/coating interface. Applying mutually-reinforcing TEM techniques, we traced evolution Zn-Fe phases in low- and high-Si steels It has been shown that conventio...

Zinc (Zn) is one of the five most widely consumed metals in world. Indeed, more than 50% all zinc produced used zinc-galvanizing processes to protect steel from corrosion. Zn-based coatings have potential for use as a corrosion-resistant barrier, but their wider restricted due poor mechanical properties Zn that are needed and other rusting. The addition alloying elements such Ni (Nickle) WC (Tu...

A study of sulfur-rich sludge (71.6% pyrite) dissolution at alkaline conditions (pH ca.9) was investigated using non-stirred and stirred flow-through experiments at room temperature (26 ± 1.2oC) and O2 partial pressure of 0.20 atm. The dissolution rate of pyrite-rich sludge was calculated based on the S release (aqueous SO4) at the steady-state. Results show that: (1) in the nonstirred reactor ...