Corrosion of Zirconium Alloys: Part Two
Zirconium is a common choice for nuclear applications due to its low thermal neutron capture cross section which is about 30 times less than that of stainless steel.A specific key useful benefit of zirconium alloys are their specific resistance to acids including hydrochloric, sulfuric and phosphoric acids which means applications which require direct contact with these substances is particularly suited.
Copper and copper alloys are extensively utilized in diverse environments due to their exceptional corrosion resistance combined with desirable properties including superior electrical and thermal conductivity, fabrication ease, and biofouling resistance. This article examines the corrosion behavior of various copper alloy families, from pure copper to complex bronzes and nickel-copper alloys.
Corrosion protection of Steel: Part One
This comprehensive article explores the critical aspects of steel corrosion protection, focusing on both the mechanisms of corrosion and various protective methods. The text examines three primary protection strategies: passive barrier protection, active protection, and sacrificial protection, with particular emphasis on modern coating technologies.
Corrosion Protection of Steel: Part Two
Metallic coatings provide a layer that changes the surface properties of the work piece to those of the metal being applied. The work piece becomes a composite material exhibiting properties generally not achievable by either material if used alone.Metallic coatings are deposited by electroplating, electroless plating, spraying, hot dipping, chemical vapor deposition and ion vapor deposition.
Ferritic stainless steels offer exceptional corrosion properties, including resistance to chloride stress-corrosion cracking, oxidizing aqueous media corrosion, high-temperature oxidation, and pitting corrosion in chloride environments. These steels contain approximately 13% or more chromium and precipitate a prime phase within the 350°C to 540°C temperature range, with maximum effects occurring at 470°C.
Zinc-aluminum alloys demonstrate exceptional corrosion resistance across diverse environments, with aluminum content enhancing zinc's inherent protective properties. This comprehensive article examines how ZA-8, ZA-12, ZA-27, and other zinc alloys perform under salt spray exposure, varying pH conditions, atmospheric elements, and industrial applications.