WSS-M21P44-A1 to A4-20040914-镀锌镍合金三价铬钝化表面处理-chs.pdf

WSS-M21P44-A1toA4-2004

CORROSIONPROTECTIVECOATING,ZINCNICKELALLOY

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腐蚀防护涂层，锌镍合金福特标准-表面处理

CORROSIONPROTECTIVECOATING,ZINCNICKELALLOY,TRIVALENTPASSIVATE,SILVER

腐蚀防护涂层，锌镍合金，三价钝化，银色WSS-M21P44-A1

CORROSIONPROTECTIVECOATING,ZINCNICKELALLOY,TRIVALENTPASSIVATEWITHORGANICSEAL,

SILVERWSS-M21P44-A2

腐蚀防护涂层，锌镍合金，三价密封，有机密封，银色

CORROSIONPROTECTIVECOATING,ZINCNICKELALLOY,TRIVALENTPASSIVATEWITHCATHODIC

ELECTROCOAT,BLACKWSS-M21P44-A3

腐蚀防护涂层，锌镍合金，三面体电极，黑色

CORROSIONPROTECTIVECOATING,ZINCNICKELALLOY,TRIVALENTPASSIVATEWITHWATERBORNE

TOPCOAT,BLACKWSS-M21P44-A4

腐蚀防护涂料，锌镍合金，三水合金，水性面漆，黑色

1.SCOPE

Thematerialsdefinedbythesespecificationsarecorrosionprotectivecoatingsappliedsequentiallypersupplier

specificationsoversteel.Theyconsistofanalkalinezincnickelalloyelectrodepositandatrivalentchromium

passivate/adhesionpromoter.A2,A3andA4arefollowedrespectivelybyanorganicseal,acathodicelectrocoat,ora

waterbornetopcoat.Whenusedwithanintegrallycuredtorquemodifiedpostdip,theseprocessesprovideconsistent

torque-tensioncontrol.Allprocessesarefreeofhexavalentchromium,leadandcadmium.

2.APPLICATION

Thesespecificationswerereleasedformaterialsusedascorrosionprotectivecoatingsoversteelfastenersandsmall

parts.Theprocessesmayinducehydrogenembrittlementandthereforethesecoatingsmustbehydrogen

embrittlementrelievedwhenapplie