A method for making pressure vessel by nickel electroforming, which includes the preparation of the mandrel, producing the copy by electrodeposition and removing the mandrel. The bath used in the electrodeposition is composed of 60-120 parts by weight of nickel sulphamate, 10-40 parts by weight of boric acid, 2-6 parts by weight of sulfamic acid, 2-6 parts by weight of nickel carbonate, 2-6 parts by weight of nickel chloride and 1000 parts by weight of water. The electrodeposition is carried out at the pH of 3.50-4.8 , the temperature is 45-70°C, the voltage and the current density are 12-15 VDC and 0.5-6.0ASD respectively. The present method is simple and does not require too much apparatus , thus it can save the producing cost and is more applicable.
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