Improvement the Corrosion Resistance for the Galvanized Steel by Adding Sn

Abstract

The chemical composition of the zinc bath can strongly influence on the hot-dip galvanized coatings. In this work, the effects of tin addition on the surface morphology, and the corrosion resistance of hot-dip galvanized steel were investigated. The corrosion behavior of steel samples galvanized with zinc and Zn-Sn alloys containing different wt% Sn was analyzed by various corrosion tests such as potentiodynamic polarization Tafel lines and electrochemical impedance spectroscopy (EIS) techniques. Salt spray test was employed in order to study the corrosion products of the specimens. Surface morphology, the composition of coating layers and nature of the corrosion products were also investigated using field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray analysis (EDX) and X-Ray diffraction (XRD) techniques, respectively. The results indicated that the addition of small amounts of Sn (0.1 wt%) to the molten zinc galvanizing bath can improve the corrosion resistance of hot-dip galvanized steel.

Protection of Galvanized steel from corrosion in salt media using sulfur nanoparticles

“…The steel forms stable bonds of iron and oxide salts because it interacts with substances in the atmosphere, and these reactions depend on the concentration of the substances and the nature of the corrosive substances present in the environment. The steel is protected from corrosion by using the galvanizing method, and this method is the most used, as the use of the galvanizing method reduces the replacement of the metal and thus saves energy 5 . Because galvanized steel is resistant to corrosion, it is therefore used in many magazines, including under sea water, car parts, and others.…”

“…It is the main source of carbohydrates, dietary fibers, minerals (Ca, Mg, P and Zn) and many important vitamins 8 . The sea water corrosivity depends on multiple factors 5 , such as: salinity, dissolved oxygen, temperature, different types of biological factors 6 (bacteria, fungus, algae), relative displacement of corrosion medium, exposed type of metal. The type of corrosion depends on the mineral exposed to the influence of sea water, so marine corrosion is known as electrochemical corrosion, i.e.…”

Investigation of Superhydrophobic and Anticorrosive Epoxy Films with Al2O3 Nanoparticles on Different Surfaces

“…On the Al 2 O 3 -added epoxy surfaces, the nanoparticles showed an anodic effect and caused the formation of white rust on the surfaces, but it was determined that red rust did not occur even though the alumina concentration was increased, indicating a good resistance of corrosion . It is known from the literature that the addition of nanoparticles to polymer systems provides significant barrier properties for corrosion protection. ,,,− Similarly, it has been shown in the study of Sharifi Golru et al that the addition of nanoalumina particles (2.5% by weight and 3.5% by weight) to epoxy caused an increase in the anti-corrosion property . Hamid et al also obtained a good corrosion resistance after a salt spray test that there was about 95% white rust and no red rust occurred on the galvanized steel sample surfaces with the addition of 0.1 Sn wt % .…”

Effects of stannum (Sn) addition on corrosion behavior and biocompatibility in vitro of biodegradable Zn–Sn alloys

“…This area can be assigned to the formation of a film that could adsorb on the electrode surface and prevent its further dissolution; thus, the current density decreases after these peaks. [ 27 ] Therefore, Sn addition increased the corrosion rate and formed the corrosion products. However, in the case of the alloy with 1.0 wt% Sn, the prepared film was incompletely formed and Zn–2.0Sn caused a more compact film of corrosion products, thereby diminishing the corrosion effect.…”