Alloy plating craft compares acidity and alkalescent zinc nickel

One, two kinds of craft actor or actress defect is compared
Acidity zinc nickel alloy plating and alkalescent zinc nickel the characteristic of the craft characteristic of alloy plating and acidity galvanization and alkalescent galvanization is similar. Contrast respectively below the main actor defect of these two kinds of craft.
Alkalescent zinc nickel the nickel of advantage acidity zinc of alloy plating the defect of alloy plating
1, all plating ability (dispersive ability) good, film 1, all plating ability (dispersive ability) relatively inferior
Ply distributings relatively even. Film ply distributinging uniformity wants difference relatively.
2, workpiece is tall, low in film of current density area 2, workpiece is tall, low in film of current density area
nickel content difference is lesser. nickel content difference is bigger.
Alkalescent zinc nickel the nickel of defect acidity zinc of alloy plating the advantage of alloy plating
1, voltaic efficiency is low, it is commonly 50% the left and right sides, 1, voltaic efficiency is tall, it is commonly 90% the left and right sides,
Film deposition rate is slow, 0.25 micron / cent left and right sides. Film deposition rate is rapid, highest can amount to 1 micron / cent above.
2, manufacturing moving cost is high. 2, manufacturing moving cost is low, basiccer technology is low 50% the left and right sides.
3, it is normal to maintain plating chamfer movement is opposite more difficult. 3, it is normal to maintain plating chamfer movement is opposite easier.
4, cannot plating Fu steel of cast-iron, cementite, high-carbon steel. 4, can plating Fu steel of cast-iron, cementite, high-carbon steel.

2, the choice of two kinds of craft
We can reach in the contrast of the characteristic from two kinds of afore-mentioned craft and actor defect, depend on to the choice of these two kinds of craft by the geometrical appearance of the material of plating Fu workpiece and workpiece. Divide steel of cast-iron, cementite outside this kind of material, by other metal stuff (basically be carbolic steel) the work that makes is chosen why to plant craft will depend on the geometrical appearance of workpiece, the principle that its choose is: The difference of current density both of the area of low current density of the high current density in the workpiece when eletroplating and workpiece uses basic technology more greatly, conversely, use acidity technology. For example, the workpiece with the central place of the workpiece that contains blind aperture or workpiece and further distance of its brim place (be like impeller) , this kind of workpiece is in the current density both of the area of low current density of the current density of the area of high current density when eletroplating and workpiece differs very big. Here the circumstance falls, if use acidity technology, the difference of the nickel content in the film ply of the area of low current density of workpiece and area of high current density and film relatively use basic technology to want to be gotten greatly much. When by plating is the work with simple appearance, the of all kinds platen of such as cylinder, piston, fastener is waited a moment, because the current density of workpiece surface is opposite consistent, here the circumstance falls, should choose acidity technology, because the 2 big advantages of basic technology already did not have much great sense, and the defect of its itself is quite outstanding however.

3, to nickel of zinc of current our country a bit view of alloy plating current situation
The our country research to zincic nickel alloy only then at going up century 80 time, what its study all eletroplate for acidity chloride craft. The author solved acidity chloride successfully the technology of alloy of electric galvanization nickel is crucial - the optimal combination additive that find and restrains deposit of nickel of area of low cathode current density effectively certainly. Because this is broken through, this craft can be used at appearance relatively complex iron and steel rack plating, also can use at barrel plating. From 1993 many unit after at first throws industrial batch to produce with this craft, among them product of a main treatment is cable bridge, in nearly 10 years Lijijia is versed in the quantity amounts to 1-2 10 thousand tons. But know with respect to author place, acidity zinc nickel although alloy plating is going up 90 time begin the century use at industrial production, but no matter all be in for the product breed from its application and amount,start level, as to alkalescent zinc nickel alloy plating has not see the report that is used at industrial production in 90 time.

Zincic nickel the thing that alloy plating gains ground in our country rapid development still is the last few years, but of development is alkalescent zinc nickel only alloy plating, alloy plating did not get acidity zinc nickel develop accordingly however. The place before be like is narrated, acidity zinc nickel alloy plating and alkalescent zinc nickel the characteristic of the craft characteristic of alloy plating and acidity galvanization and alkalescent galvanization is similar, the choice of craft all depends on the appearance of workpiece (the) outside be being planted except certain steel, some applicable and basic technology, some applicable and acidity craft, accordingly, normally zincic nickel alloy plating the use scale of two kinds of craft should is close to roughly with the scale of acidity galvanization and alkalescent galvanization, and not due the difference of great disparity.

According to knowing, our country acidity galvanization occupies the 50% above of electric galvanization gross, alkalescent galvanization is occupied about 40% the left and right sides, and acidity zinc nickel although alloy plating did not see countrywide statistic data but won't exceed 10% according to author estimation. Alloy plating place occupies acidity zinc nickel to depend on should using acidity zinc nickel originally in great quantities than the small account with such example the workpiece of alloy plating used alkalescent zinc nickel generally at present alloy plating craft. It is according to pillar of colliery monomer hydraulic pressure only exemple, the whole nation makes dosage exceeds 1 million, countless concentrated eletroplate for this the unit of treatment uses alkalescent zinc nickel generally alloy plating craft is not acidity zinc nickel alloy plating craft. Carry out to the research and development of these two kinds of craft and production according to the author, this kind adds workpiece to be in film nickel content film ply is identical, identical, be able to bear or endure below the circumstance of corrode sex likeness, use acidity zinc nickel its production cost can reduce alloy plating craft 50% the left and right sides, yield can rise 2 times above. The author does not plan here to causing our country in recent years zincic nickel the develops a condition reason that disagreement of two kinds of craft often manages undertakes alloy plating discuss, but the meeting after forecasting this kind of state to will be in several years only gets a change, acidity zinc nickel the scale that alloy plating craft will rise to its place to should be occupied stage by stage.

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