首(Shou)先(Xian)工(Gong)艺(Yi)区(Qu)别(Bie)：(?)冷(Leng)镀(Du)锌(Xin)也(Ye)叫(Jiao)电(Dian)镀(Du)锌(Xin),是(Shi)利(Li)用(Yong)电(Dian)解(Jie)设(She)备(Bei)将(Jiang)工(Gong)件(Jian)经(Jing)过(Guo)除(Chu)油(You),酸(Suan)洗(Xi)后(Hou)放(Fang)入(Ru)成(Cheng)分(Fen)为(Wei)锌(Xin)盐(Yan)的(De)溶(Rong)液(Ye)中(Zhong),并(Bing)连(Lian)接(Jie)电(Dian)解(Jie)设(She)备(Bei)的(De)负(Fu)极(Ji);在(Zai)工(Gong)件(Jian)的(De)对(Dui)面(Mian)放(Fang)置(Zhi)锌(Xin)板(Ban)连(Lian)接(Jie)在(Zai)电(Dian)解(Jie)设(She)备(Bei)的(De)正(Zheng)极(Ji),接(Jie)通(Tong)电(Dian)源(Yuan),利(Li)用(Yong)电(Dian)流(Liu)从(Cong)正(Zheng)极(Ji)向(Xiang)负(Fu)极(Ji)的(De)定(Ding)向(Xiang)移(Yi)动(Dong),就(Jiu)会(Hui)在(Zai)工(Gong)件(Jian)上(Shang)沉(Chen)积(Ji)一(Yi)层(Ceng)锌(Xin)。(?)热(Re)镀(Du)锌(Xin)是(Shi)将(Jiang)工(Gong)件(Jian)除(Chu)油(You),酸(Suan)洗(Xi),浸(Jin)药(Yao),烘(Hong)干(Gan)后(Hou)浸(Jin)入(Ru)溶(Rong)化(Hua)的(De)锌(Xin)液(Ye)里(Li)一(Yi)定(Ding)时(Shi)间(Jian),提(Ti)出(Chu)来(Lai)即(Ji)可(Ke)。(?)     外(Wai)观(Guan)的(De)区(Qu)别(Bie)：(?)电(Dian)镀(Du)锌(Xin)外(Wai)表(Biao)比(Bi)较(Jiao)光(Guang)滑(Hua),明(Ming)亮(Liang),采(Cai)用(Yong)彩(Cai)色(Se)钝(Dun)化(Hua)工(Gong)艺(Yi)的(De)电(Dian)镀(Du)层(Ceng)也(Ye)黄(Huang)绿(Lu)色(Se)为(Wei)主(Zhu)色(Se),呈(Cheng)七(Qi)彩(Cai)。(?)采(Cai)用(Yong)白(Bai)色(Se)钝(Dun)化(Hua)工(Gong)艺(Yi)的(De)电(Dian)镀(Du)层(Ceng)呈(Cheng)青(Qing)白(Bai)色(Se)或(Huo)白(Bai)色(Se)呈(Cheng)绿(Lu)光(Guang),白(Bai)色(Se)钝(Dun)化(Hua)工(Gong)艺(Yi)的(De) 镀(Du)层(Ceng)与(Yu)阳(Yang)光(Guang)呈(Cheng)一(Yi)定(Ding)角(Jiao)度(Du)下(Xia)略(Lue)显(Xian)七(Qi)彩(Cai)。(?)在(Zai)复(Fu)杂(Za)工(Gong)件(Jian)的(De)角(Jiao)棱(Leng)部(Bu)位(Wei)容(Rong)易(Yi)产(Chan)生(Sheng)电(Dian)烧(Shao)而(?)成(Cheng)灰(Hui)暗(An),该(Gai)部(Bu)位(Wei)锌(Xin)层(Ceng)较(Jiao)厚(Hou)。(?)在(Zai)阴(Yin)角(Jiao)部(Bu)位(Wei)易(Yi)形(Xing)成(Cheng)电(Dian)流(Liu)死(Si)角(Jiao)而(?)产(Chan)生(Sheng)欠(Qian)电(Dian)流(Liu)灰(Hui)暗(An)区(Qu),该(Gai)区(Qu)域(Yu) 锌(Xin)层(Ceng)较(Jiao)薄(Bao)。(?)工(Gong)件(Jian)整(Zheng)体(Ti)无(Wu)锌(Xin)瘤(Liu),结(Jie)块(Kuai)等(Deng)现(Xian)象(Xiang)。(?)热(Re)镀(Du)锌(Xin)外(Wai)观(Guan)较(Jiao)电(Dian)镀(Du)锌(Xin)稍(Shao)微(Wei)粗(Cu)糙(Cao),呈(Cheng)银(Yin)白(Bai)色(Se),外(Wai)观(Guan)容(Rong)易(Yi)产(Chan)生(Sheng)工(Gong)艺(Yi)水(Shui)纹(Wen)和(He)少(Shao)许(Xu)滴(Di)瘤(Liu),尤(You)其(Qi)是(Shi)在(Zai)工(Gong)件(Jian)的(De)一(Yi)端(Duan)较(Jiao)为(Wei)明(Ming)显(Xian)。(?)但(Dan)热(Re)镀(Du)锌(Xin) 的(De)锌(Xin)层(Ceng)比(Bi)电(Dian)镀(Du)锌(Xin)厚(Hou)几(Ji)十(Shi)倍(Bei),防(Fang)腐(Fu)蚀(Shi)性(Xing)能(Neng)是(Shi)电(Dian)镀(Du)锌(Xin)的(De)几(Ji)十(Shi)倍(Bei)。(?)     热(Re)镀(Du)锌(Xin)钢(Gang)管(Guan)的(De)两(Liang)端(Duan)有(You)蓝(Lan)色(Se)油(You)墨(Mo)印(Yin)的(De)箍(Gu),通(Tong)体(Ti)有(You)执(Zhi)行(Xing)标(Biao)准(Zhun)和(He)规(Gui)格(Ge)型(Xing)号(Hao);在(Zai)热(Re)镀(Du)锌(Xin)钢(Gang)管(Guan)的(De)一(Yi)端(Duan)有(You)锌(Xin)针(Zhen)或(Huo)少(Shao)许(Xu)瘤(Liu)挂(Gua),内(Nei)外(Wai)都(Du)有(You)完(Wan)整(Zheng)的(De)镀(Du)锌(Xin)层(Ceng),外(Wai)观(Guan)没(Mei)有(You)冷(Leng)镀(Du)锌(Xin)光(Guang)滑(Hua);冷(Leng)镀(Du)锌(Xin)镀(Du) 层(Ceng)有(You)光(Guang)亮(Liang),与(Yu)太(Tai)阳(Yang)成(Cheng)一(Yi)定(Ding)角(Jiao)度(Du)下(Xia)这(Zhe)种(Zhong)光(Guang)亮(Liang)成(Cheng)七(Qi)彩(Cai),冷(Leng)镀(Du)钢(Gang)管(Guan)孔(Kong)内(Nei)只(Zhi)有(You)在(Zai)两(Liang)端(Duan)有(You)少(Shao)许(Xu)锌(Xin)层(Ceng),再(Zai)往(Wang)里(Li)没(Mei)有(You)镀(Du)锌(Xin)层(Ceng),冷(Leng)镀(Du)锌(Xin)国(Guo)内(Nei)钢(Gang)管(Guan)两(Liang)端(Duan)一(Yi)样(Yang)光(Guang)滑(Hua),****没(Mei)有(You)锌(Xin)瘤(Liu)产(Chan)生(Sheng),外(Wai)表(Biao)没(Mei)有(You)执(Zhi)行(Xing)标(Biao)准(Zhun)。(?)