第二版取消并取代第一版（即ISO 2179:1972）。规定了成分约为65%（m/m）锡和35%（m/m）镍的金属间化合物SnNi电镀层的要求。本标准不适用于螺纹部件、未经加工的螺纹、螺纹或钢丝涂层、螺旋弹簧涂层、抗拉强度大于1000 MPa的钢电镀。

This second edition cancels and replaces the first edition (i. e. ISO 2179:1972). Specifies requirements for electroplated coatings of the intermetallic compound SnNi, with a composition of approximately 65 % (m/m) tin and 35 % (m/m) nickel. It does not apply to threaded components, coatings on cheet, stsrip or wire in the unfabricated form, coatings on coil springs, electroplating of steels with tensile strength greater than 1 000 MPa.