Sand Erosion Behavior of Cast Aluminum Alloys

抄録

The present paper primarily concerns itself with the use of aluminum alloys for marine applications. The objective of this research is to consider the effects of Mg concentration, slurry speed, sand grain size, sand-to-water ratio and temperature on the sand erosion resistance of five typical types of aluminum alloys. Quantitative relationships for these were also derived.
Cylindrically-shaped test specimens were attached to a rotating disc immersed in a slurry. Erosion rate was based on the amount of weight loss. Mg concentration varied depending on the alloy used. Slurry speed varied with the rotation of the disc. Three types of sand were examined and their respective grain sizes determined. Sand-to-water ratio was varied from 0-40% and tests were conducted using temperatures of 293K and 280K.
From the given conditions, the following conclusions were derived. In Al-Mg type of alloys, the sand erosion resistance increases when the magnesium content increases. The factors affecting erosion rate (W_k) mainly consist of slurry speed (V), sand grain size (F) and sand volume percentage (p). Also, the relationship may be shown in the following formula:
W_k=K·p^1/2(Vⁿ/F^m)