The history of solid-solution-strengthened Ni alloys for aqueous corrosion service

Abstract

While nickel has been known for centuries as a material for various uses, including the Ni-Fe expansion alloys that were developed around 1896, the history of the solid-solution-strengthened nickelbased alloys begins with the development of the Ni-Cu alloy Monel ® in 1906. Since that time many other alloys have been developed containing other elements and possessing signifi cantly different corrosion resistance. These developments have also been aided by developments in the metallurgical processing of nickel alloys. This paper will discuss the major nickel alloy developments that have allowed and expanded the use of these alloys in the chemical processing industry.

Mechanical Properties and Microstructural Characterization of Aged Nickel-based Alloy 625 Weld Metal

“…One of the most interesting characteristics of the nickel-based superalloys is its high corrosion resistance to an aqueous chloride medium. [1] Furthermore, these alloys exhibit extraordinary resistance to a wide range of organic and mineral acids due to their excellent corrosion resistance properties, mainly, at high temperatures, and, therefore, are commonly found in the marine, aerospace, chemical and oil and gas industries. [2][3][4][5] The alloy Inconel® 625 stands out as one of the leading commercial Ni-Cr-Mo-Nb alloy grades.…”

Assessment of microstructure of alloy Inconel 686 dissimilar weld claddings

“…This allows possibilities for the development of new alloys with specific characteristics and applications [6]. Alloying elements such as Cr, Mo and W are examples of elements that introduce their own special properties to improve corrosion resistance.…”

Aspectos metalúrgicos de revestimentos dissimilares com a superliga à base de níquel inconel 625

“…Segundo Hodge [11], esta família de superligas de Ni são tipicamente aplicadas quando a presença de impurezas no sistema, especialmente sais, alcançam valores onde as classes com menores teores de molibdênio sofrem corrosão localizada. Sua resistência à corrosão é significativamente maior que a dos aços inoxidáveis quando expostos a alta temperatura, aplicadas em equipamentos de processamento químico e petroquímico, equipamentos de refinarias de petróleo e gás, trocadores de calor resfriados com água do mar e equipamentos para processamento de fluidos ácidos e contendo elevados teores de sais.…”