【正文】 商調(diào)整測試。④待噴工件又經(jīng)磷化處理。④返工件不要經(jīng)過磷化，只需打磨，吹凈表面即可。④掛具導(dǎo)電不良。②檢查輸送鏈接地是否良好。⑥檢查風(fēng)道和風(fēng)機。④粉末熔融粘度太低。③增加電壓，縮短噴槍與工件的距離或適當(dāng)延長對邊緣的噴涂時間。②掛具反方向傾斜，積液無法烘烤干。③改進工件掛法，或修正工件邊緣結(jié)構(gòu)使烘烤中不積液。①調(diào)整溫度和時間，再作檢驗。②烘烤溫度低，粉末沒有充分固化。⑥除油除銹不徹底。③同14②。⑦加強現(xiàn)場管理。s round and protuberant.③A few sand grains, of different sizes.④There is impurity on surface of the workpiece, sometimes looking radiationtype or slender⑤A few black grains.①Measure film thickness to see it conforms to technique requirement or not.②Check powder quality to see whether there are gel particles and impurity on surface of the workpiece after phosphatization.③Mainly caused by unclean environment. Keep tidy any time.④Check powder quality, the operator should try not to wear trousers or gloves falling tiny fibrin.⑤Impurity of the furnace tunnel (such as gel matter) gets on the workpiece, please clear periodically. 8No spray or insufficient spray①Inferior powder spray material. The powder is easy to attach on its internal wall.②Insufficient pressure or air quantity.③The spray pipe is heated therefore powder sinters inside the pipe.④The spray pipe is bent and twisted.⑤The powder sinters and can not flow normally.①Replace high quality spray pipe.②Check air source and pressure and regulate.③Install airconditioner. Check grainness of the powder. If too rough please notice the powder factory to modify.④Check powder spray pipe, and regulate position of the regulation pipe.⑤Screen first. If it doesn39。t consistent.③Spray system (including workpiece) polluted by outer impurity matters, especially silicon remover and waterproofing reagent in the workshop.④Casting surface has large and deep holes.⑤Round and large holes appear on the coating layer, called as fish eyes.⑥Compressed air has high content of oil.①Contact producer to change the powder. ②Complete change and cleaning of spray room. Better if working out cleaning and checking procedure.③Check spray scene carefully and dispose of impurity matters. Make regulations to prevent intrusion of these matters.④Complete sand spray. Casting should be preheated at temperature and time subject to materials and thickness.⑤Pollution of drying and solidifying furnace channel should be cleared. Check lifter and rubber belt pollute the powder or not.⑥Check filter of air pressor, add oilwater separator and discharge regularly in every shift.3Partial or most area shedding of the coating area①Uncleared rust on surface of the base material.②Unclean washing, especially after phosphatization.③Unplete deoiling of surface of base material.④Lubricant on the chain drops to the work piece.⑤Bubbling of galvanized board and shedding of coating layer.①Through rust removal.②Check flowing quantity, water quality and nozzle. Check washing flow rate and pressure.③Use chemical oil removal (suitable for plant oil and not suitable for mineral oil) with alkali. And wash forcefully ten (pay attention to water quality)④Check lubricant index. If necessary, replace with lubricant of higher withstanding temperature or place receiver under dripping point.⑤Refer to attachment I.4Yellowing of the coating layer①Set temperature of the furnace channel or oven is relatively high.②Gas gets into the oven or furnace channel directly.③Too long stay in the furnace channel or oven, or conveyance chain stops running.④Powder quality.⑤Repeated baking of workpiece for more than 2 times.⑥Serious decoloring of the dope.①Get to know normal solidification condition and adjust.②Heating thermal exchanger.③Get to know baking condition. Be noted that whether conveyance chain running normal or not closely. If stop producing, end all workpiece baking and discharge the materials.④Powder supplier offers sample boards under different baking condition for reference in course of spraying.⑤Try to finish baking one time. Workpieces needing second baking should be treated centrally and determine repeated baking condition first.⑥Check baking temperature too high or not(. 230? or even higher. Check withstanding capability of the powder.5Luster unstability①Lower luster②Higher luster③Fluctuate luster④Sudden dropping of luster①Check baking temperature and time proper or not and consult powder manufacturer about baking condition. And also water content and humidity of the spray room in addition.②Exam baking temperature and time according to ①. Check luster and workpiece thickness and baking condition.③See it39。⑤測量膜厚，并調(diào)整噴涂參數(shù)。①調(diào)整磷化參數(shù)（如濃度，溫度，時間等）。④粉末過期。③檢查粉末生產(chǎn)日期，過期粉先檢驗，合格才能用。②粉末品質(zhì)不好。①將掛具改成細(xì)圓棍形。⑤粉末廠必須修正配方。①噴涂前修理工件邊角，使成圓弧形。②固化溫度低，粉末流動時間長。④定期清理（脫漆）或更換。⑥回收裝置風(fēng)道堵塞或回收系統(tǒng)無法正常運轉(zhuǎn)。②工件接地不良。②減少出粉量，降低供粉氣壓和增大霧化氣壓。②出粉量太大。并控制輸送鏈運動平滑，不能有抖動現(xiàn)象。③磷化不充分，存在粉杠現(xiàn)象。④檢查輸粉管，并注意調(diào)整管的放置位置。①更換高質(zhì)量的噴粉管材。②氣壓或氣量不足。④檢查粉末質(zhì)量，操作員盡量不穿戴易掉細(xì)小纖維的衣褲和手套等。⑤少量黑色顆粒。7砂料①均勻密集出現(xiàn)。④檢查并更換。①加強膜厚控制。④文丘里管磨損，出粉不勻。檢查是否混入其它粉。檢查是否有混粉及噴涂環(huán)境濕度變化。另可檢查粉末的含水率和噴房的濕度。5光澤不穩(wěn)定①光澤偏低。⑤盡量一次烘烤完成。②加裝熱交換器。④粉末質(zhì)量。⑤參見附一。②檢查脫說流量，水質(zhì)和噴嘴。③底材表面除油不徹底。檢驗升降機和橡膠皮帶是否污染粉末。制訂規(guī)章嚴(yán)防帶入這些干擾物品。⑥壓縮空氣油含量高。②噴涂過程中混進其它粉，因不相容造成縮孔。清洗噴嘴，使水壓。①磷化后，及時烘干，立即噴涂。③前處理，磷化后發(fā)黃。 rubbing, most dope fully solidified allows slight or no damage (such as fading, dulling, shedding and bubbling etc.).Furthermore, there should be parison test, namely paring to standard board with powder dope fully solidified, to test onspot dope layer solidifies fully or not. If the dope layer is discovered to bee soft and sticky and the cotton strip is colored seriously, it indicates that the dope doesn39。Skills of operators. force test tool: American knife or shaver, cross scriber, tape and magnifier.Test process of adhesion force of powder dope:① Scribe the coating layer through till the base material by shaper, each 610 lines portrait or landscape. For film thickness more than 80181。Exterior state (pattern, levelling and luster) disagree