Magnesium alloys in commercial

Although the corrosion of pure magnesium in commercial coolants has been reported [9,31], in practice, an engine block cannot be made of pure magnesium, and the coolant cannot be pure ethylene glycol solution only. Therefore, it is important to understand the corrosion behaviour of magnesium alloys in commercial coolants. 

The inhibition mechanism of fluorides described above also operates on magnesium alloys in commercial coolants. For example, the inhibition effect of KF on the general corrosion of AM-SCl in MBL coolant at room temperature is illustrated in Fig. 11.10. The general corrosion rate of AM-SCl decreases as the concentration of KF increases. When the concentration of KF is greater than 1 wt%, the corrosion rate becomes lower than the corrosion rate threshold of 0.67 mg/cm /week [26]. However, for galvanic corrosion at high temperature, KF does not work very well in the MBL coolant. 

G. Song, D.H. StJohn, Corrosion of magnesium alloys in commercial engine coolants . Materials and Corrosion, 56 (2005) 15-23. 

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