Effect of Increasing Salinity to Corrosion Resistance of 5052 Aluminum Alloy in Artificial Seawater

Abstract

The purpose of this research is to investigate the corrosion resistance of 5052 aluminum alloy to increasing salinity in sea water. Salt spray chamber was used to measure and compare the corrosion rate of 5052 aluminum alloy with weight reduction method. The experiment was conducted by varying the three concentrations of NaCl solution to compare the corrosion rate of the metal. The test specimens used were aluminum alloy 5052 with length of 6 cm, width of 4 cm and thickness of 0.7 cm. The tests were carried out for 48 hours, aggressive NaCl solutions with concentrations of 3.5%, 4% and 5% were used as an artificial sea water corrosion medium and the temperature in the test chamber was maintained at 35 °C. Corrosion rate for 3.5% NaCl solution, 4% NaCl solution and 5% NaCl solution were 0.197 mm/year, 0.541 mm/year and 0.558 mm/year, respectively. The higher concentration leads to greater corrosion rate.

Effect of seawater salinity, pH, and temperature on external corrosion behavior and microhardness of offshore oil and gas pipeline: RSM modelling and optimization

“…Their study demonstrated that escalating NaCl concentrations from 3.5 to 10% led to a decrease in corrosion rate. Likewise, in 2019, Darmawan, Agung Setyo, et al 22 investigated the influence of salinity on aluminum alloy in artificial seawater and reported a similar correlation. This behavior can be attributed to the reduction in oxygen solubility accompanying increased water salinity, subsequently lowering water conductivity and, consequently, diminishing the corrosion rate 23 , 24 .…”

“…Likewise, in 2019, Darmawan et al . 22 investigated the influence of salinity on aluminium alloys in artificial seawater and reported a similar correlation. The reason for these finding could be a reduction in oxygen solubility accompanying increased water salinity, subsequently lowering water conductivity and, consequently, diminishing the corrosion rate 23 , 24 .…”

Insight of Salt Spray Corrosion on Mechanical Properties of TA1-Al5052 Self-Piercing Riveted Joint

“…The corrosion rate of metal is a key parameter by which to express the corrosion resistance of the alloys and their joints [ 32 , 33 , 34 ]. In the case of uniform corrosion and proper removal of corrosion products from the metal surface, the corrosion rate is expressed as Equation (1).…”

The Effect of Heat Treatment and Pressing at 400 °c With Coconut Shell Charcoal Media on the Hardness, Microstructure, and Density of Al-Si Alloys

“…Currently, aluminum is a non-ferrous metal that is most widely used in many branches of industry because of its superior and superior properties, especially Aluminum-silicon (Al-Si) alloys. In its development, Aluminum-silicon is widely used as a material for making a product because it has excellent castability, good weldability, good thermal conductivity, high strength at high temperatures, and excellent corrosion resistance [1][2][3][4][5][6].…”