在不同含量硝酸溶液中对6 mm厚5083-H116铝合金板材进行晶间腐蚀试验，通过测量质量损失的方法来衡量其晶间腐蚀敏感性。结果表明：随着硝酸含量降低，5083-H116铝合金板材的晶间腐蚀倾向变大；当硝酸稀释至质量分数为51%时，质量损失已不满足≤15 mg/cm²的标准要求。

Intergranular corrosion test was carried out for 5083-H116 aluminium alloy plates with thickness of 6 mm in nitric acid solution with different concentrations. The susceptibility to intergranular corrosion of 5083-H116 aluminium alloy plates was evaluated by mass loss method. The results show that the tendency to intergranular corrosion became large with the decrease of nitric acid concentration for 5083-H116 aluminium alloy plates. When nitric acid was diluted to 51% of mass fraction, the mass loss could not meet the standard requirement of no larger than 15 mg/cm².