Corrosion Behaviour of Passive Layer Growth by Controlling Additives of Nano-Metals-Phosphate to Pure Aluminum

Hussein A Hussein,Alaa Abdulhasan Atiyah,Mohammed J Kahdim

doi:10.24237/djes.2020.13401

Hussein A Hussein, Alaa Abdulhasan Atiyah + Show 1 more

Open Access

https://doi.org/10.24237/djes.2020.13401

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Abstract

This study investigates how microstructure and chemistry effects by Nano-Metal-Phosphate and the kinetics of growth passive layer and passivity breakdown. Additionally, the passive layer germination behavior on aluminum alloy 1050 with anticorrosive properties. The passive layer is an alloying method which allows an aluminum oxide to germinate. Morphologically and structurally, the aluminum oxide films were characterized using microscopy analyzes and XRD analysis. Results indicated that the reinforcements are well distributed and the grin size is downy. Corrosion behavior tested by Cyclic polarization exam and done at room temperature in (3.5 per cent NaCl) solution. The reinforcement increased the hardness for processed aluminum from Hv81.1 to HV=120.492 as castings. The parameter Nano-Metal-Phosphate has attenuated the current density of corrosion (7.15μA / cm2) compared to the as-cast sample results.

Highlights

Aluminum and its alloys are used in many industrial and engineering applications, due to their extreme properties, high mechanical properties, high wear and corrosion resistance, and adequate weight resistance [1]
Alloys showed that coarser dendritic structures higher yield resistance to corrosion than downy dendritic structures, and that this is associated with the interdimeric mixture morphology [9]; Samuel et al [10] investigated that a further increase in the Fe content, and the size of the-Al5Fe platelets, causes an increase in pore sizes, but Platelets constrict the pores
Iron is a common element for impurities in low concentrations of aluminum alloys that can act as a catalyst for grain refining

Summary

Introduction

Aluminum and its alloys are used in many industrial and engineering applications, due to their extreme properties, high mechanical properties, high wear and corrosion resistance, and adequate weight resistance [1]. Metallic materials alloys with their varied compositions are widely used in transport, such as cars, aircraft and parts, as well as in alternative applications such as appliances, technology, construction and containers [2,3]. When these materials are exposed to corrosive media it will corrode and restrict their applications. There are several trails to assess aluminum's resistance corrosion. These include; the addition of minor percentages of additional passive alloy metals [8]. Alloys showed that coarser dendritic structures higher yield resistance to corrosion than downy dendritic structures, and that this is associated with the interdimeric mixture morphology [9]; Samuel et al [10] investigated that a further increase in the Fe content, and the size of the-Al5Fe platelets, causes an increase in pore sizes, but Platelets constrict the pores

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