Protective Action of Sodium Metavanadate Against Corrosion of AD31 Aluminum Alloy in Neutral Chloride-Containing Media

Considering corrosion control of aluminum is of great technical, economic, environmental and aesthetical importance, the use of inhibitors is one of the promising solutions for protecting aluminum and its alloys against corrosion. The research about green corrosion inhibitors which are environmentally friendly and do not contain heavy metals or other toxic compounds has gained a large interest. This study is an effort to investigate the role of a natural organic dye, Crocin, against the corrosion of a commercial aluminum alloy AA1050, in an aggressive chloride ions environment of NaCl 0,01M, in comparison with a synthetic dye, Alphazurine A. Corrosion behavior of AA1050 specimens in NaCl 0,01M solution at room temperature was studied by investigating their electrochemical behavior in the absence and presence of the two organic dyes, using DC Corrosion techniques, Linear Polarization and Tafel Polarization. The effect of the organic dyes as corrosion inhibitors was also evaluated by mass loss measurements. Study and characterization of the morphology of the surface of the specimens, before and after the corrosion measurements, was performed using Scanning Electron Microscopy. Results obtained showed that the examined dyes have a protective action against corrosion of aluminum surface in the corrosive environment.

Download Full-text

Techniques for Transmission Electron Microscopy of Fiber-Matrix Interfaces in Aluminum Alloy-Boron Composites by Ion Erosio

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100065079 ◽

1971 ◽

Vol 29 ◽

pp. 204-205

Author(s):

G. G. Shaw

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Aluminum Alloy ◽

Electron Beam ◽

Pure Aluminum ◽

Ion Milling ◽

Transmission Electron ◽

Fiber Matrix ◽

Ion Erosion ◽

Row Of Fibers

The morphology and composition of the fiber-matrix interface can best be studied by transmission electron microscopy and electron diffraction. For some composites satisfactory samples can be prepared by electropolishing. For others such as aluminum alloy-boron composites ion erosion is necessary.When one wishes to examine a specimen with the electron beam perpendicular to the fiber, preparation is as follows: A 1/8 in. disk is cut from the sample with a cylindrical tool by spark machining. Thin slices, 5 mils thick, containing one row of fibers, are then, spark-machined from the disk. After spark machining, the slice is carefully polished with diamond paste until the row of fibers is exposed on each side, as shown in Figure 1.In the case where examination is desired with the electron beam parallel to the fiber, preparation is as follows: Experimental composites are usually 50 mils or less in thickness so an auxiliary holder is necessary during ion milling and for easy transfer to the electron microscope. This holder is pure aluminum sheet, 3 mils thick.

Download Full-text

Identifying Present Danger; Taking Protective Action

PsycEXTRA Dataset ◽

10.1037/e548302010-004 ◽

2010 ◽

Author(s):

Travis Erickson

Keyword(s):

Protective Action

Download Full-text

Anisotropic yield function of sheet forming simulation for aluminum alloy by using commercial FEM software “LS-DYNA V950"

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:20030170 ◽

2003 ◽

Vol 105 ◽

pp. 47-52

Author(s):

K. Yamada ◽

H. Mizukoshi ◽

K. Okada ◽

N. Ma ◽

N. Sugitomo

Keyword(s):

Aluminum Alloy ◽

Yield Function ◽

Sheet Forming ◽

Forming Simulation ◽

Anisotropic Yield Function

Download Full-text

Liquorice exaggerates protective action of Solanum xanthocarpum against cigarette smoke induced pulmonary inflammation

Planta Medica ◽

10.1055/s-0034-1382708 ◽

2014 ◽

Vol 80 (10) ◽

Author(s):

RA Manek ◽

NR Sheth ◽

JR Chavda ◽

JD Vaghasiya ◽

KP Modi ◽

...

Keyword(s):

Cigarette Smoke ◽

Protective Action ◽

Pulmonary Inflammation ◽

Solanum Xanthocarpum

Download Full-text

Action of Lysolecithin on Blood Platelets

Thrombosis and Haemostasis ◽

10.1055/s-0038-1655005 ◽

1963 ◽

Vol 09 (03) ◽

pp. 512-524 ◽

Cited By ~ 4

Author(s):

Chava Kirschmann ◽

Sara Aloof ◽

Andre de Vries

Keyword(s):

Blood Platelets ◽

Protective Action ◽

Platelet Surface ◽

Washed Platelet ◽

Sufficient Concentration ◽

Saline Medium

SummaryLysolecithin is adsorbed to washed blood platelets and, at sufficient concentration, lyses them, inhibits their clot-retracting activity and promotes their thromboplastin-generating activity. Lysolecithin adsorption to the platelet was studied by using P32-labelled lysolecithin obtained from the liver of rats injected with labelled orthophosphate. The amount of lysolecithin adsorbed to the surface of the washed platelet in saline medium is dependent on the concentration of lysolecithin in solution and reaches saturation — 5 × 10-8 jig per platelet — at a concentration of 9—10 µg per ml. Platelet lysis in saline medium begins at a lysolecithin concentration higher than 18 jig per ml. Plasma and albumin prevent adsorption of lysolecithin to the platelet and protect the platelet from damage by lysolecithin. Albumin is able to remove previously adsorbed lysolecithin from the platelet surface. The protective action of plasma explains the lack of platelet damage in blood, the plasma lecithin of which has been converted to lysolecithin by the action of Vipera palestinae venom phosphatidase, in vitro and in vivo.

Download Full-text