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测出了热喷铝镀层的电化学性能以确定该镀层作为水中钢牺牲阳极的性能。试验环境有盐雾箱和在流动海水(ASTM)中浸渍。在浸浸试验中,一半试样被机械加工出空白区(8％的面积),另一半试样与表面积类似的钢试样电连接。对电位进行18个月的监测,仍可令人满意地继续保护。电量测试试验表明:火焰熔喷的铝镀层的发生电流量为3.6安·小时/厘米~3。这些数据说明,如果喷镀工艺合适,热喷铝镀层可为钢提供足够的阴极保护。
The electrochemical properties of the thermally sprayed aluminum coating were measured to determine the performance of the coating as a steel sacrificial anode in water. The test environment was a salt spray box and immersed in flowing seawater (ASTM). In the immersion test, half of the specimens were machined to a blank area (8% area) and the other half of the specimens were electrically connected to steel specimens of similar surface area. Eighteen months of monitoring of the potential remain satisfactory with continued protection. Electricity test shows that the current of flame sprayed aluminum coating is 3.6 A · h / cm ~ 3. These data illustrate that thermal sprayed aluminum coatings provide adequate cathodic protection for steel if the sputtering process is appropriate.