1. 鎳-鐵-鎢-磷-硫合金電刷鍍(du)層的(de)性質
鎳-鐵-鎢-磷-硫合金電刷鍍層具有近于硬鉻的耐磨性,又有與在線亞洲日產一區二區:321不銹鋼相當的抗蝕性,銀白色,刷鍍后可降表面粗糙度2~4級。合金中各元素質量百分比為鎳(62%~64%)、鐵(26%~28%)、鎢(7%~9.5%)、磷(0.5%~2%)、硫(0.5%~2%)。
2. 鎳-鐵(tie)-鎢(wu)-磷(lin)-硫合金電刷鍍液的性(xing)質
在刷鍍(du)過程中,溶(rong)液穩定(ding),工(gong)藝參數穩定(ding),易獲得高質量(liang)的合金鍍(du)層。溶(rong)液中的金屬離(li)子濃度比(bi)值為c(Ni2+):c(Fe2+): c(W6+)=(30~33) : (4~6) : (2~4)。
3. 鎳(nie)-鐵(tie)-鎢-磷-硫合(he)金(jin)電刷鍍液成分
硫酸鎳(NiSO4·6H2O) 150~300g/L(最佳值300g/L)
硫酸亞鐵(FeSO4·7H2O) 20~80g/L(最佳值60g/L)
鎢酸鈉(Na2 WO4·2H2O) 5~20g/L(最佳值15g/L)
次磷酸鈉(NaH2PO2·H2O) 1~2g/L(最佳值1.5g/L)
硫酸鈉(Na2SO4) 10~30g/L(最佳值20g/L)
硼酸(H3BO3) 30~60g/L(最佳值45g/L)
檸檬酸三鈉(Na3C6H5O7·H2O) 60~120g/L(最佳值100g/L)
糖精(C7H5O3NS) 0.5~3g/L(最佳值1.5g/L)
化鎘(CdCl2·2.5H2O) 0.1~0.2g/L(最佳值0.15g/L)
pH 2.5~3.5
4. 鎳-鐵-鎢-磷(lin)-硫(liu)合金電(dian)刷鍍(du)液的(de)配制(zhi)
在(zai)1000mL的燒(shao)杯(bei)內,加(jia)(jia)(jia)(jia)(jia)入(ru)裝餾(liu)(liu)水(shui)(shui)300ml,加(jia)(jia)(jia)(jia)(jia)入(ru)硫酸(suan)(suan)(suan)鎳(nie)300g,加(jia)(jia)(jia)(jia)(jia)熱(re)(re)攪(jiao)(jiao)拌(ban)溶(rong)(rong)(rong)(rong)解(jie)(jie)(jie)。在(zai)另一個250mL燒(shao)杯(bei)中(zhong)加(jia)(jia)(jia)(jia)(jia)入(ru)蒸餾(liu)(liu)水(shui)(shui)100ml,加(jia)(jia)(jia)(jia)(jia)入(ru)硫酸(suan)(suan)(suan)亞鐵60g,加(jia)(jia)(jia)(jia)(jia)熱(re)(re)攪(jiao)(jiao)拌(ban)溶(rong)(rong)(rong)(rong)解(jie)(jie)(jie),加(jia)(jia)(jia)(jia)(jia)入(ru)鎢酸(suan)(suan)(suan)鈉(na)(na)15g,加(jia)(jia)(jia)(jia)(jia)熱(re)(re)攪(jiao)(jiao)拌(ban)溶(rong)(rong)(rong)(rong)解(jie)(jie)(jie),將此溶(rong)(rong)(rong)(rong)液(ye)(ye)(ye)倒(dao)入(ru)硫酸(suan)(suan)(suan)鎳(nie)溶(rong)(rong)(rong)(rong)液(ye)(ye)(ye)中(zhong),在(zai)250mL燒(shao)杯(bei)中(zhong),加(jia)(jia)(jia)(jia)(jia)入(ru)蒸餾(liu)(liu)水(shui)(shui)100mL,加(jia)(jia)(jia)(jia)(jia)熱(re)(re)至沸騰,加(jia)(jia)(jia)(jia)(jia)入(ru)硼(peng)酸(suan)(suan)(suan)45g,攪(jiao)(jiao)拌(ban)溶(rong)(rong)(rong)(rong)解(jie)(jie)(jie),加(jia)(jia)(jia)(jia)(jia)入(ru)檸檬酸(suan)(suan)(suan)三鈉(na)(na)100g,加(jia)(jia)(jia)(jia)(jia)熱(re)(re)攪(jiao)(jiao)拌(ban)溶(rong)(rong)(rong)(rong)解(jie)(jie)(jie),倒(dao)入(ru)含硫酸(suan)(suan)(suan)鎳(nie)等鹽的溶(rong)(rong)(rong)(rong)液(ye)(ye)(ye)中(zhong),攪(jiao)(jiao)拌(ban)均(jun)勻。在(zai)250mL的燒(shao)杯(bei)中(zhong)加(jia)(jia)(jia)(jia)(jia)人蒸餾(liu)(liu)水(shui)(shui)50mL,加(jia)(jia)(jia)(jia)(jia)熱(re)(re)至70℃,依次加(jia)(jia)(jia)(jia)(jia)入(ru)次磷酸(suan)(suan)(suan)鈉(na)(na)1.5g,硫酸(suan)(suan)(suan)鈉(na)(na)20g,糖(tang)精(jing)1.5g,氯化(hua)(hua)鎘0.15g,攪(jiao)(jiao)拌(ban)溶(rong)(rong)(rong)(rong)解(jie)(jie)(jie),加(jia)(jia)(jia)(jia)(jia)入(ru)1000mL的燒(shao)杯(bei)中(zhong),用10%硫酸(suan)(suan)(suan)或氫氧(yang)化(hua)(hua)鈉(na)(na)稀溶(rong)(rong)(rong)(rong)液(ye)(ye)(ye)調節溶(rong)(rong)(rong)(rong)液(ye)(ye)(ye)pH為3,再倒(dao)人1000mL量筒或量瓶中(zhong),加(jia)(jia)(jia)(jia)(jia)蒸餾(liu)(liu)水(shui)(shui)至刻度。
5. 使用方法和工藝規(gui)范(fan)
工作溫度(du):30~50℃;
工(gong)作電壓:6~12V;
陰(yin)極電流密度:80~100A/d㎡;
陰陽極(ji)相對(dui)運動速率:14~22m/min.
工(gong)藝(yi)流程:電凈→水洗(xi)→活化→水洗(xi)→特(te)殊鎳→水洗(xi)→本(ben)合(he)金刷鍍→水洗(xi)→干(gan)燥。

