The present invention provides a manufacturing method of a surface-treated Zn-Ni alloy electroplated steel sheet, the method comprising the steps of: preparing a Zn-Ni alloy electroplated steel sheet including a steel sheet and a Zn-Ni alloy-plated layer with an Ni content of 5-20 wt% (S1); preparing an alkali electrolyte solution in which 4-250 g/L of potassium hydroxide (KOH) or sodium hydroxide (NaOH) or both combined are added in distilled water (S2); and inside the alkali electrolyte solution, placing the Zn-Ni alloy electroplated steel sheet as a positive electrode and installing another metal sheet as a negative electrode, and applying 2-10 V of an alternating or direct current to conduct electrochemical etching such that a 3-point average value of the arithmetic average roughness (Ra) of the surface of the Zn-Ni alloy electroplated steel sheet reaches 200-400 nm, thereby producing a surface-treated electroplated steel sheet (S3).
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机译：本发明提供一种表面处理的Zn-Ni合金电镀钢板的制造方法，该方法包括以下步骤：制备包括钢板和具有以下特征的Zn-Ni合金镀层的Zn-Ni合金电镀钢板： Ni含量为5-20重量％（S1）;制备碱性电解液，其中在蒸馏水中加入4-250 g / L的氢氧化钾（KOH）或氢氧化钠（NaOH）或两者结合。在碱性电解液的内部，以Zn-Ni合金电镀钢板为正极，以另一金属板为负极，施加2-10V的交流或直流电进行电化学蚀刻，使Zn-Ni合金电镀钢板的表面的算术平均粗糙度（Ra）的-点平均值达到200-400nm，从而制备表面处理过的电镀钢板（S3）。
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