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AlSi12 alloys and alloys produced by Mg addition at different ratios (1% - 2% and 4%) were manufactured by
pressurized casting method. Quartz tubes with an inner diameter of 8 mm were used in the castings of the alloys. All castings
were carried out in an argon gas atmosphere. These samples (7 mm x 20 mm) were homogenized at 520 ° C for 6 hours.
Samples prepared by standard metallographic procedures were immersed in a jar containing 30 gr/l NaCl + 10 ml/l HCl acid
solution and samples were weighed at 2-6-12-24 hours intervals. It is clear that the increased Mg ratio reduces the corrosion
resistance of the alloys. The reason for this decrease in corrosion resistance is Mg2Si which is likely to occur after Mg addition.
Intermetallic are thought to accelerate corrosion by forming a galvanic couple with the matrix. As a result of the corrosion test,
SEM images taken from the surface also support our corrosion graph. Thus, when we look at the samples without Mg addition,
it is seen that the surface deformation is very small compared to the samples produced by Mg addition.
International Conference of Advanced Materials and Manufacturing Technologies
ICAMT
Engin ÇEVİK
S. Yasin
Harun ÇUĞ
Necmi Ozdemir
R. Yildiz
S. Akka