MaterialSpecificationMetals材料标准金属GM7114M

CorrosionProtectiveCoatings腐蚀保护涂层

Phosphate/Zinc/OrganicType磷化/锌/有机类型共10页第1页

通用

1Scope

Thisspecificationcoversthebasicrequirementsforanon-electrolyticallyapplied,non-oilycorrosionprotective

coatingconsistingofzincphosphatetreatment,zincrichinorganicresincoatingandaluminumrichorganic

topcoat.Thisfinishisavailableingrayandblackcolors.Itissuppliedingraycolorunlessblackcoloris

specified.

1．范围

本标准包含了非电解质应用的基本要求，包含锌盐磷化处理，锌富无机树脂涂层和铝富有机顶部涂

层的非油保护涂层。本表面处理颜色有灰色和黑色。除非规定是黑色，一般供应灰色。

1.1MaterialDescription.Thecoatingsystemisfreeofhexavalentchromate,withnohexavalentchromateinfinal

productperGMW3059requirements.GMW3034willbeusedasarefereetest.Thiscoatingprocessdoesnot

generatehydrogen,however,pretreatmentprocessesi.e.acidpicklingcouldcausehydrogenabsorption.

Non-electrolyticallyappliedzincrichcoatinghashighpermeability,whichallowseffusionofhydrogenduringcuring

thatmighthavebeenabsorbedduringacidpickling.

1．1材料描述。按GMW3059要求，涂层体系不含六价铬，在成品中不含六价铬。GMW3034标准作为

仲裁试验。涂层工艺不产生氢，然而，预处理工艺，如酸洗会导致吸收氢。非电解锌富涂层具有高

度的渗透性，这样会把在酸洗过程中吸收的氢在加工过程中渗出。

1.2TypicalApplication.Thecoatingissuitableforexternallythreadedandnon-threadedferrouspartswherehigh

levelsofcorrosionprotectionandfreedomfromhydrogenembrittlementarerequired.Whenappliedoversteelthatis

tobecoupledtoaluminum,thecoatingprovidesexceptionalgalvanicprotection.Thiscoatingisnotrecommendedfor

internallythreadedpartsandpartswithrecessdrives.

1.2典型的应用。涂层适用于外螺纹和非螺纹黑色金属零件，这些零件要求高度防腐保护和去

除氢脆。如果涂复在铝上，涂层应有额外流电保护。涂层不推荐