锌酸盐镀锌液中锌、氢氧化钠失调对镀层有何影响和处理?

影响：① 彩钢板锌含量过低，电流密度和电流效率上限降低，镀锌速度慢；含量太高，镀层粗糙、较暗，分散能力和深镀能力也较低；
② 氢氧化钠含量太低，阳极钝化，电池电压升高，彩钢板镀层暗而粗糙；高含量和快速阳极溶解导致锌含量增加和镀层粗糙。
处理方法：① 锌含量一般控制在8~12g/L；② 为了稳定溶液，应将其控制在[NaOH]/[Zn]²+]=8~10或[NaOH]/[ZnO]=10~12。
锌酸盐镀锌溶液中的油污对涂层和处理的影响：

如果由于操作不慎，导致 彩钢板镀液被油污染（主要是由于机器擦拭的旧棉纱掉入镀液中所致），镀件会被划伤、起雾、起泡，镀液混浊，无法继续生产。
处理方法：① 先用粗纸（不带填料的白纸），切成16~32开孔尺寸，贴在液面上去除油膜；
② 在连续搅拌下，铝粉被喷洒到槽中。铝粉与镀液发生剧烈反应，释放出氢气，将污垢挡在液面之外。这时，一个人不停地搅拌，一个人不停地用镀镍铜丝网捕鱼。一段时间后，撒上一些铝粉继续上述操作。10001，约1kg铝粉用于南方语言。问题完全解决，镀件完全正常。

Effects: ① the zinc content is too low, the upper limit of current density and current efficiency are reduced, and the galvanizing speed is slow; The content is too high, the coating is rough and dark, and the dispersion ability and deep plating ability are also low;

② The content of sodium hydroxide is too low, the anode is passivated, the cell voltage increases, and the coating is dark and rough; High content and fast anodic dissolution lead to increasing zinc content and rough coating.

Treatment method: ① generally control the zinc content at 8 ~ 12g / L; ② In order to stabilize the solution, it should be controlled at [NaOH] / [Zn] ²+]= 8 ~ 10 or [NaOH] / [ZnO] = 10 ~ 12.

Influence of oil stain in zincate galvanizing solution on coating and treatment:

If the bath solution is polluted by oil due to careless operation (mostly caused by the old cotton yarn wiped by the machine falling into the bath), the plated workpieces will be scratched, foggy, foamed and the solution is turbid, and the production will not continue.

Treatment method: ① first use coarse paper (white paper without filler), cut it into 16 ~ 32 open size, and stick it to the liquid level to remove the oil film;

② Under continuous stirring, the aluminum powder is sprinkled into the tank. The aluminum powder reacts violently with the plating solution and releases hydrogen to hold the dirt out of the liquid level. At this time, one person keeps stirring and one person keeps fishing out with nickel plated copper wire mesh. After a certain time, sprinkle some aluminum powder to continue the above operation. 10001, about 1kg aluminum powder is used in southern language. The problem is completely solved and the plated workpiece is completely normal.