Corrosion Engineering And Corrosion Science

Abstract

The corrosion scientist and corrosion engineer are complementary; their efforts are synergistic in solving problems of corrosion control. The broad background of a corrosion engineer capable of covering the entire field of corrosion engineering includes knowledge of chemistry, metallurgy, physical, chemical and mechanical properties of materials, electrical engineering, mechanical engineering, biology, stress analysis, economics, human nature and many other fields. The corrosion scientist and corrosion engineer should regard each other with equal esteem, the only basis for evaluating the other's efforts being quality of work.

Three-dimensional modeling of in-ground cathodic protection systems with deforming anodes

“…The minimum required mass of magnesium anode for the calculated CP capacity can be obtained from the following equation: where is the minimum required mass of anode material (kg), and is the theoretical capacity of anode material, which is 0.251 A-yr/kg for selected magnesium anodes 18 , 19 . The parameter is the current efficiency of anode material and is 50% for high-potential magnesium anodes.…”

Inhibitory Action of 1–phenyl–3–methylpyrazol–5–one (HPMP) and 1–phenyl–3–methyl–4–(p–nitrobenzoyl)– pyrazol–5–one (HPMNP) on the Corrosion of Alpha and Beta Brass in HCl Solution

“…Actually, both elements dissolve and copper is re-deposited to form the reddish -appearing surface. This process of losing zinc from the alloy, (Brass), leaving a porous mass of copper (having poor mechanical strength) is known as Dezincification [4]. This type of corrosion manifests itself in two general ways:-Uniform or Layer -type Dezincification, and Local or Plug -type.…”

“…For examples, the use of Red Brass (85% Cu, 15% Zn) has eliminated dezincification in plumbing pipe systems. Brasses containing less than 80% Cu, may de-zincify under corrosive conditions, and Muntz Brass (60% Cu, 40% Zn) has the least resistance of the commercial copper -zinc alloy [4].…”

Investigation of laser peening effects on hydrogen charged stainless steels

“…When the hydrogen atoms permeate into the metal the travel through the crystal lattice along microstructural channels or through innerstitial lattice sites [5,6,7]. The majority of these sites are ordinary sites described by the normal enthalpy of solution with respect to the atmosphere of hydrogen where the lattice is in contact [4].…”

“…Symons summarizes previous work on the mechanism for hydrogen embrittlement in materials by describing three theories [7]. The first mechanism originally proposed by Steigerwald and furthered by Oriani and Josephic details a decohesion mechanism where hydrogen collects in microvoids which coalesce, decreasing the cohesive energy between atoms and promoting cleavage [8,9].…”