Zincate zinc plating bath
a zinc plating and bath technology, applied in the field of zinc plating baths, can solve the problems of uniform electrodeposition, deterioration of uniform electrodeposition and throwing power, and achieve the effects of high throwing power, high plating efficiency, and high plating efficiency
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example 1
[0068]In accordance with the composition shown in Table 1, a zincate zinc plating bath containing 8 g / L of zinc ions, 10 g / L of sodium hydroxide, 0.4 g / L of a 1:1 (molar ratio) condensation polymer of dimethylaminopropylamine and epichlorohydrin (Compound A of Table 1, product of URSA CHEMIE GMBH, Product number: Product J 138 M) as a primary brightener, 0.03 g / L of veratraldehyde—Na sulfite adduct (product of Wako Pure Chemical Industries, which will equally apply hereinafter) as a secondary brightener obtained by dissolving and reacting in a sodium hydrogen sulfite solution, and 0.05 g / L of 2,5-dimercapto-1,3,4-thiadiazole (Compound J in Table 1, product of Toyo Chemical Industry, MTD) as a plating accelerator, was prepared. The concentration of each of the above compounds (including a polymer) was adjusted by conversion in terms of a purity (content) and a molecular weight of a commercially available product of each compound obtained (which will equally apply to determination of ...
example 2
[0069]In accordance with the composition shown in Table 1, a zincate zinc plating bath containing 6 g / L of zinc ions, 100 g / L of sodium hydroxide, 1.0 g / L of a water soluble cationic macromolecular compound represented by the below-described formula (III) (Compound B of Table 1, trade name: MIRAPOL (trade mark) WT, product of Rhodia [formerly Rhone-Poulence], CAS No. 68555-36-2) as a primary brightener, 0.025 g / L of anisaldehyde—Na sulfite adduct (product of Wako Pure Chemical Industries, which will equally apply hereinafter) as a secondary brightener obtained by dissolving and reacting in a sodium hydrogen sulfite solution, and 0.02 g / L of 2,5-dimercapto-1,3,4-thiadiazole (Compound J of Table 1) as a plating accelerator was prepared.
example 3
[0070]In accordance with the composition shown in Table 1, a zincate zinc plating bath containing 9 g / L zinc ions, 120 g / L sodium hydroxide, 0.6 g / L of a water soluble cationic macromolecular compound represented by the above chemical formula (III) (Compound B of Table 1, trade name: MIRAPOL (trade mark) WT, (product of Rhodia), CAS No. 68555-36-2) as a primary brightener, 0.025 g / L of veratraldehyde as a secondary brightener, and 0.075 g / L of 2,5-dimercapto-1,3,4-thiadiazole (Compound J of Table 1) as a plating accelerator was prepared.
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