A comparative study of the structure and the corrosion behavior of zinc coatings deposited with various methods

Comparative study of the corrosion behavior of zinc coatings deposited on low carbon steel substrates

“…In the case of the pack coatings, the delta phase is the outer phase of the coating. 8 Consequently, the outer surface of the pack coating is characterized by a large density of crack tips. These cracks offer paths to the chloride ions, which penetrate into the coating and react with oxygen and zinc, resulting in the formation of water-soluble zinc compounds.…”

“…8 The powder mixture used was composed by 50 wt% Zn, 2 wt% NH 4 Cl and 48 wt% Al 2 O 3 , while the pack temperature was 400°C and the heating duration 2 h. The corrosion testing was performed in a salt spray chamber (SSC) SC-450. The as-cast specimens were hanged vertically with nylon fibers at about the center of the working volume.…”

“…The structure of the Zn pack coatings was reported elsewhere. 8 However, only a little information is presented concerning their anticorrosive performance, a preliminary examination of which is presented in this work, along with a comparison with literature data about hot-dip galvanizing.…”

Impact of zinc halide addition on the growth of zinc-rich layers generated by sherardizing

“…In this process steel substrates are covered in zinc powder and annealed below the melting point of zinc resulting in the formation of intermetallic Fe-Zn phases on the steel surface [6,7]. Despite the effectiveness of hot dip galvanizing [3,8] sherardizing has several advantages. Sherardizing leads to highly uniform layer thicknesses that allows coating of irregular shapes and threaded parts [2,6].…”

Application of PEO113–b-PS218 nano-aggregates for improved protective characteristics of composite zinc coatings in chloride-containing environment

“…The electrodeposited zinc and zinc alloy coatings on a steel substrate find practical utilization in various industrial applications, providing protection of the steel substrate as a result of impeded corrosion initiation and/or propagation [1][2][3][4][5]. As well known, under atmospheric conditions zinc corrodes by a factor of up to 100 times less than steel [6].…”