高精純黑色膜處理

來源:東莞市華宇五金膜層處理廠  作者: 盤先生

廣州五金機械配件耐蝕性磷化產(chǎn)品詳細(xì)

ph Phosphating of phosphating film in liquid iron ionconcentration is too low, so the required ph. Instead, the ironions content is higher, the less acid alkaline. Use high manganeseseries phosphating solution of free acid ph control is very simple,such as acid, alkali is 1 then free acid is 0.1. Explore acidalkaline reaction of manganese series phosphating solution, resultsshowed that nitrate content of 0.5, when ph 5 said passivationreaction, passivation membrane. Acid alkali is 2, the film is acomplex of phosphating film and passivation film, the nitratecontent, the greater the phosphating film area is larger, when theacid alkali is 3, phosphating film formed, so the department ofhigh manganese phosphating liquid acid alkaline 2.5 is best. Thetemperature Whether can for the production of theuid and phosphating film, temperature is an important one of thereasons, and temperature on the efficiency of the phosphating filmand phosphating effect is very obvious. Suitable temperature cannot only make the iron in the melting of the anode region and ironphosphate reaction, shorten the time of the phosphating filmformation. Can also activate a region of low ability, forming theactivation center the crystal increase , and formthe crystallization speed, at the time of reaction and generation,the center of the large crystal havent fully grown, and have newcrystals begin to produce. Meticulous crystallization density,phosphating film closely, thickening of the thickness of thephosphating film, enhanced corrosion resistance, low temperaturephosphating film formed of the phosphating liquid content of lessthan, cant complete phosphating film production. Temperature is toolarge, which leads to the separation of components can bedissolved, separating out large amounts of zinc ion and phosphateion, makes a lot of phosphate rapid separation, produce largeamounts of sediment, losing the original dynamic e,liquid at room temperature is too high, not only affect the changeof acid ratio, and reaction speed too fast, the phosphating filmcrystallization bulky, void ratio is too large, produce phosphatingphosphating film residue super weight, corrosion resistance is low,influence the luster of the coating, and bath stability.  

東莞市華宇表面磷化膜處理廠主營高難度表面錳系磷酸鹽磷化處理、抗防銹機械灰黑磷化處理、抗蝕性金屬鐵系磷酸鹽磷化、耐磨性零件淺黑色磷化處理。咨詢 5030

東莞市鋅磷化處理廠

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Phosphating process of form a complete set of e calculationof phosphating tank volume According to the weight and area of theworkpiece phosphating tank volume calculation, control andreasonable product area and the proportion of theuid product, avoid because of phosphating work continuouslyproduce large amounts of bivalent iron ion, lead to blackphosphating liquid, according to the conventional phosphating tankof the solutions of load per unit volume is 3-15 square metre percubic, can not be more than 258 square meters each cubic, or bathbecause the load is too large, important component inuid consumption too fast, prompted the phosphating liquid isunstable, difficult to adjust. phosphating tank manufacturingPhosphating tank generally pided into two types: circular tank andthe rectangular slot, in front of a suitable for mass production,the latter is suitable for the production and batch. Material mustbe used in the phosphating slot can withstand the corrosion ofphosphating liquid and high temperature resistant, must havesufficient strength to withstand a load of phosphating liquid neverdeformation. Phosphating tank best with 4 to 8 mm thickness ofsteel plate, manganese phosphating liquid temperature is higher,generally around 95 degrees, solution acidity, selects thestainless steel, plastic tank, with 8 to 14 mm plastic board aswell, some phosphating tank with the cement tank, inside put aplastic or glass fiber reinforced plastic anti-corrosion, thephosphating tank production costs low, can produce largephosphating slot. Ship form phosphating slot with cone bucket,facilitate collection phosphating residue. Cone bucket candischarge in the phosphating slot at the bottom, also can be inlocal place, should be designed at the bottom of the nozzle, thephosphate slag flow in accordance with the re to the conebucket. Square phosphating tank bottom to the slag discharge mouthtilt, the slope gradient is 4 to 8, in the phosphating slot slopeddrain pipe should be assigned to the lowest place. Phosphating tankvolume of general solutions for 3 to 5 times the pump output.
 

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