影响刷镀层质量的因素及消除方法

刷镀层质量主要是指刷镀层与基体金属的结合强度及镀层的机械、物理、化学性能。而镀层的结合强度是衡量镀件能否使用的首要指标,只有在达到结合强度的前提下,才能谈到沉积速度、镀层表面光洁度等其它质量问题。对刷镀层与基体金属结合强度的影响因素及消除方法,初步认为有以下几方面: 1.被镀工件表面原有的污染物清除不彻底工件在储存、运输和使用过程中,表面存有油污及灰尘杂质,这些污染物如不彻底清除干净,会使镀层结合层强度明显下降,以致局部或整体脱落。刷镀时,主要用电净液、活化液将其清除。在电净之前,须用机械加工方法加以去除。

金属喷镀的实践与理论分析

金属喷镀对修复磨损零件是一种很有前途的方法 ,应用金属喷镀将磨损的零件恢复到原来尺寸 ,无论从节约金属材料、节省时间 ,还是经济性均具有重要意义。介绍了金属喷镀的试验装置、金属喷镀工艺过程 。

Effect of Volume Fractions of Arc Sprayed Al Coatings on Tensile Properties of a Type 316 Steel Substrate

The effect of arc sprayed times, which are quantitatively described by the volume fraction of coatings, on the mechanical properties of type 316 steel, have been undertaken in the present work. Al wires were utilized as coatings materials. Tensile tests were carried out in the temperature range of Portevin-Le Chatelier (PLC) effect It has been found that grains at edges and corners of the 316 steel specimens have been dramatically constricted by grit blasting and spraying. Grit blasting has been found to exert a shot-peening effect on the mechanical properties of 316 steel specimens. Coatings with lower values of coating volume fraction strengthen the coated specimens in the very similar way as blasting. While if the volume fraction of coating, (Vv)c, exceeds a critical value, (VV)K, softens the specimens. Specimens with low values of (Vv)c, have high values of flow stress, as well as higher values of work-hardening coefficient, Calculations based on the experimental results show that the high thickness coatings have relatively lower contribution to the mechanical properties of specimens.

800kV裕隆换流站GIS钢结构的防护

以裕隆高电压换流站钢结构工程中使用的防护为背景,介绍了冷喷锌涂料的原理、优势及在施工过程中的各项参数。该锌盾镀层能够有效隔绝防腐因子并具有极佳的长效防腐能力。