前处理不良，油脂，氧化物。异物尚未除去，镀层无法析出。
Bad, grease, dealing with before. Foreign body has not been removed, oxide coating cannot exhalation.
双层镍作中间镀层的装饰性铬-镍合金试件经16小时铜加速盐雾试验（CASS）后，外观未出现不良现象。 镀层显示了较好的耐蚀性能。
Experienced 16 hours of CASS standard test, the plating layer, based on double post-plating nickel layers, still preserves perfect decorative appearance and shows good property of anti-erosion.
研究结果表明，实际生产中导致粘附性不良的原因多种多样，但却都表现为镀层异常。
Research results show that there are different causes for poor coated layer adhesion in actual production, but abnormal coated lay structure can be found out in every case of poor adhesion.
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