The Development Of Polishing Agent And Processing For Al-Si Alloy Product With Spiral Vibration Polishing

Polishing is an important procedure in surface treatment of Al & Al alloy. After polishing, more smoothness and brightness surface of the product could be obtained and its decoration effect could be improved. Chemical polishing is used widely because of its mature polishing mechanism and good effect. However, it couldn't get satisfied result of Al alloy with high quantity Si. Because it will have Silicon gray on product surface after polishing. Efficiency of mechanical polishing is very low and it is usually used to polish plat surface, which limited its application. Thus it is essential to look for a kind of polishing style fit for Al alloy with high quantity Si, which can satisfied market needs. So we full studied the spiral vibration polishing of Al-Si alloy product, also developed polishing agent for spiral vibration polishing, and some conclusion are list as following:It's essential to add blended acid wash procedure before the spiral vibration polishing. The blended acid is nitric acid and hydrofluoric acid, and the optimal mix ratio is 2:1.Studied equipment and processing parameters of spiral vibration polishing. Adopted orthogonal design to optimize the main processing parameters.Developed polishing agent for spiral vibration polishing, and polishing agent is composed of surfactant, acid agent, and water. Analyze effect of eachChose and matched several kinds of surfactant, including nonionic surfactant and negative ion surfactant. Make sure that polishing agent is composed of surfactant, acid agent, and water, and make a detail analysis of each ingredient. All developed polishing agent APG-1, APG-2, APG-3 have good polishing effect.Primarily discussing the mechanism of Al-Si alloy spiral vibration polishing, also analyzing ingredient of surface after polishing using X-Ray DiffractThe function of polishing database system is safety management, query and modification of information.