Requirements for zinc coating treatment of hot dip galvanized products in power fittings

Requirements for zinc coating treatment of hot dip galvanized products in power fittings

Requirementsforzinccoatingtreatmentofhotdipgalvanizedproductsinpowerfittings

1热镀锌液

总杂质含量(例外，锡，铝，镍)inzincsolutionusedforhotdipgalvanizingofelectricpowerfittingsshallnotexceed1.50%ofthetotalmass.refertogb/t470fortheimpurities.

2.surfacetreatmentrequirementsbeforegalvanizing

2.1工作表面光滑光滑，没有可编辑的、无缺陷的部件、沥青划痕和其他影响质量的缺陷。5.2敷设前，表面油和rust.weldingslagandoxidelayershallberemoved.the应补充温升，即铺设前的13912~2.2.2，油亮星焊接斜面焊，然后按照右旋糖酐t13912的规定完成预处理。"(2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.

三层楼

3.1anditisnotallowedtohavethezinclayerexudatedfromtheacidreturningmacular.thepresenceofdarkorlightgrayunevencolorareaswithzinclayerthicknessmeetingtherequirementsshallnotbethereasonforrejectionofproducts.

3.2zincleakagespotswithdiameterlessthan0.5mmareallowedonlocalsurfaces.

3.3对于有接触、接触和保护要求的零件，不允许使用。

3.4.浓缩无锌区，convextumorandripplearenotallowedonthesurfaceofplatingparts.thetotalareaofscatteredzincfreezone，保险杠-

A)thegeneralpartsshallnotexceed0.5%ofthetotalareaoftheplatingparts

(B)大部件(千斤顶等压盾构，面积大于2000厘米)shallnotexceed0.1%ofthetotalareaoftheplatingpart；c)thezincleakagespotsonthegalvanizedsurfaceoftheweldareallowed，andthetotalareashallnotexceed3%oftheweldarea.

Theabovezincfreeareashallberepairedbyzincrichpaintorbyweldingwithlowmeltingpointzincalloyelectrode.theuseofzincrichpaintshallcomplywithhg/t3668.

3.5thesurfacedefectsofworkpiecebeforegalvanizing，suchassandholeandslaginclusioncausedbycastingandforgingprocess，shallnotberegardedasthequalitydefectofcoating.

四厚层

后取样，thezincthicknessofthesampleandtheoverallzincthicknessofthesampleshallnotbelowerthanthesmallvaluespecifiedintable2.

Requirementsforzinccoatingtreatmentofhotdipgalvanizedproductsinpowerfittings

Requirements for zinc coating treatment of hot dip galvanized products in power fittings