| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique to obtain an iron-nickel alloy having a similar nature as that of an invar composition, by plating.SOLUTION: A electroplating bath for an iron-nickel alloy having low thermal expansion coefficient and high hardness is characterized in that an electroplating bath for an iron-nickel alloy contains an unsaturated sulfonic acid compound represented by the general formula (1) (in the formula, R represents a vinyl group or an ethynyl group, X represents an alkylene group or a phenylene group, which may be substituted, and Y represents an alkali metal). An electroplating method uses this. |
