The invention discloses an aluminum base
alloy soluble in water and
aqueous medium environments and a preparation method thereof. The
alloy is composed of, by weight, 90%-94% of Al, 1.8%-4.8% of low-melting-point metals and 2.5%-7.6% of reinforced aluminum
alloy elements. The low-melting-point metals include Ga, In, Sn, Bi and Pb, wherein the Ga, In and Sn are essential elements in the alloy; one or both of Bi and Pb can be added in the alloy, but the content of the Pb cannot exceed 0.3% by weight; and the reinforced aluminum alloy elements include one or more of Ti, Cu, Fe, Mg, Zn, Mn, Si, Li, Zr, Y and Gd, wherein the Cu and Mg are essential elements in the alloy. The aluminum base alloy soluble in the water and
aqueous medium environments is smelted under normal pressure and then poured into a mould for making a
casting, and a product is formed after
solid solution and aging treatment. The initial
reaction temperature and the
dissolution rate of the obtained product in the water and
aqueous medium environments can be adjusted and controlled. The alloy is large in strength and can be used for manufacturing soluble down-hole tools, and the manufactured tools can automatically decompose in high-temperature and high-pressure watery environments.