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镍钴铁（镍铁钴）镀铬合金的替代品，具有耐磨性两次铬，耐腐蚀，是增加2.6倍。 With the appropriate nickel and iron content, a color similar to that of chromium can be obtained.用适当的镍和铁的含量，可以得到类似的颜色铬。 The iron and cobalt in solution increase hardness and stability.铁和钴溶液中增加了硬度和稳定性。
Friction and wear tests were performed on this particular coating using a ball-on-disc machine.这个特殊的涂层用球 - 圆盘机上进行摩擦磨损试验。 The surface was observed using a scanning electron microscope (SEM), and the surface composition analyzed with a x-ray analyzer.使用扫描电子显微镜（SEM），并用X-射线分析仪分析表面成分，表面观察。 Hv hardness was determined to be 1,118 at room temperature, whereas hard chromium was 900 Hv. HV硬度被确定为1,118室温，而硬铬为900暖通。 Hv hardness of the Ni-Fe-Co coating did not change until the temperature reached 300C, where it went to 1,552; at 400C, it was 1,422; at 500C, it was 1,300; at 600C, it was 1,190; and at 700C, it was 1,040.沉积Ni -Co-Fe涂层的硬度HV没有改变，直到温度达到300C，它在哪里就去到1552; 400C，它是1422; 500C，它是1300; 600C，它是1190和700C，它是1,040。
The wear rate for the Ni-Fe-Co plating was 110.56 10-17[m.sup.3]/NM (where V=lm/s, P=600 N, T=30 min).镍铁钴镀层的磨损率为110.56 10-17 [m.sup.3 /海里（其中：V =流明/ S，P = 600 N，T = 30分钟）。 The wear rate for hard chromium was 241.11 10-17[m.sup.3]/NM [2,3].耐磨硬铬率为241.11 10-17 [m.sup.3] / NM：[2,3]。
In tests on other cobalt-based coatings, it was found that the coatings adhere well to carbon and mild-steel substrates, however cracks are evident in the coating at temperatures of 500C and higher.其他钴基涂层的试验，结果发现，涂料以及坚持以碳和轻度钢基板，然而裂缝是在涂层明显，在500C的温度和较高的。 Cobalt-tungsten coatings are said to peel at 600C and are softer than hexavalent chromium plated coatings.钴钨涂层在600C和剥离说是比六价铬镀涂层柔软。 Therefore, these are not seen as good alternatives to hexavalent chromium plating.因此，这些不被视为替代六价铬电镀。 因此钨合金电镀受镀层性能影响，不是理想的代铬镀层。
Nickel and cobalt iron (nickel-iron, cobalt) alloy chrome alternatives.
Substitute for chrome-plated alloy of nickel and cobalt iron (nickel-iron, cobalt), with the wear resistance of the two chromium, corrosion resistance, is increased by 2.6 times. With the appropriate content of nickel and iron, you can get a similar color chrome. Iron and cobalt in solution increased the hardness and stability.
This special coating with the ball - disc machine on the friction and wear tester. Using the scanning electron microscope (SEM), X-ray analyzer to analyze the surface composition and surface observation. HV hardness was determined to be 1,118 at room temperature, and hard chrome 900 HVAC. Hardness HV of the deposition of Ni-Co-Fe coating did not change until the temperature reaches 300C, where it went to 1552; 400C, 1422; 500C, 1300; 600C, it is 1190 and 700C, it is 1,040 .
The wear rate of the nickel-iron-cobalt coatings 110.56 10-17 [m.sup.3 / nautical miles (: V = lumen / S, P = 600 N, T = 30 minutes). Wear-resistant hard chrome was 241.11 10-17 [m.sup.3] / NM: [2,3].
Other cobalt-based coating test and found that the coatings as well as adhere to the carbon and mild steel substrate, however, apparent cracks in the coating, the 500C temperature and higher. Cobalt-tungsten coating in the 600C and peel than hexavalent chromium plating coating soft. Therefore, these will not be considered as alternative to hexavalent chromium plating. Tungsten alloy plating coating performance impact is not ideal on behalf of the chrome plating.
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