Aluminum alloys are known to have many advantages (e.g., light weight and low cost) but they not immune corrosion. So, it is important assess their corrosion behavior, in particular under atmospheric conditions. To protect aluminum against corrosion, paints generally applied onto the materials. Corrosion protection aerospace industry consists of a conversion or anodized coating, an inhibited pr...

Everted membrane vesicles of Pseudomonas aeruginosa PAO1 harboring plasmid pCRO616, expressing the ChrA chromate resistance protein, accumulated four times more (51)CrO(4)(2-) than vesicles from plasmidless cells, indicating that a chromate efflux system functions in the resistant strain. Chromate uptake showed saturation kinetics with an apparent K(m) of 0.12 mM chromate and a V(max) of 0. 5 n...

In the present work, a flash-PEO coating is developed on AZ31B alloy in combination of silicate, phosphate, and fluoride based electrolyte order to offer green alternative chromate conversion coatings. Multilevel active protection achieved through synergetic self-sealing effect PEO itself inhibition provided by an organic inhibitor impregnated pores post-treatment step. The results indicate tha...

Chromium is a trace metal of importance in human physiology and, in addition, as 51-chromate, has been extensively used as a label in the study of blood cell pool sizes and intravascular kinetics. The transport characteristics of 51-chromate were investigated in normal human leukocytes. Chromate uptake is unidirectional over a 1 hr incubation with extracellular chromate concentrations up to 200...

Cr(VI) (chromate) is a widespread, toxic and soluble environmental contaminant. Bacteria can reduce chromate to insoluble and less toxic Cr(III), and thus chromate bioremediation is of interest. Genetic and protein engineering of suitable enzymes can improve bacterial bioremediation. However, many fundamental parameters that define an organism’s capacity to remediate chromate have not previousl...

Cr(VI) (chromate) is a toxic, soluble environmental contaminant. Bacteria can reduce chromate to the insoluble and less toxic Cr(III), and thus chromate bioremediation is of interest. Genetic and protein engineering of suitable enzymes can improve bacterial bioremediation. Many bacterial enzymes catalyze one-electron reduction of chromate, generating Cr(V), which redox cycles, generating excess...