SHANGHAI, Mar 16 (SMM) - In March, the nickel sulphate market will be in a supply surplus, which may drive down the prices. To sum up, the downstream demand will decrease in March. The downward trend of nickel sulphate prices will hardly be reversed in the short term since the demand from ternary precursor producers will grow slowly in March, and the cost efficiency of nickel sulphate in producing electrowinning nickel falls. The prices will fall slowly to 38,000-40,000 yuan/mt amid the supply tightness and high costs of raw materials.