阅读说明：本技术 一种碱性光亮砂面剂及其制备方法 (Alkaline bright sand surface agent and preparation method thereof ) 是由 王相刚 夏良文 肖茂强 刘国永 于 2019-09-17 设计创作，主要内容包括：本发明公开了一种碱性光亮砂面剂,其包括如下原料组分：氢氧化钠60～80g/L、氯化钠50～100g/L、油酸钠2～5g/L、硫代硫酸钠1～3g/L、复合表面活性剂5～10g/L、EDTA 0.5～1g/L、絮凝剂0.1～0.5g/L,渗透剂0.1～0.3g/L,余量水。本发明的砂面剂配方集除油、除蜡、碱蚀、砂光功能于一体,有效简化铝及铝合金表面处理的前处理工序,可获得表面清洁度、光泽度良好的铝型材。且该砂面剂无毒无磷,不含强酸、重金属离子,环保无污染。本发明还公开了该砂面剂的制备方法,其简单高效,节能环保,有利于大规模工业化生产。(The invention discloses an alkaline bright sand surface agent, which comprises the following raw material components: 60-80 g/L of sodium hydroxide, 50-100 g/L of sodium chloride, 2-5 g/L of sodium oleate, 1-3 g/L of sodium thiosulfate, 5-10 g/L, EDTA 0.5-1 g/L of composite surfactant, 0.1-0.5 g/L of flocculating agent, 0.1-0.3 g/L of penetrating agent and the balance of water. The formula of the sand finishing agent integrates the functions of oil removal, wax removal, alkaline corrosion and sanding, effectively simplifies the pretreatment process of surface treatment of aluminum and aluminum alloy, and can obtain aluminum profiles with good surface cleanliness and glossiness. The sand surface agent is non-toxic and phosphorus-free, does not contain strong acid and heavy metal ions, and is environment-friendly and pollution-free. The invention also discloses a preparation method of the sand surface agent, which is simple, efficient, energy-saving and environment-friendly and is beneficial to large-scale industrial production.)

1. The alkaline bright sand surface agent is characterized by comprising the following raw material components: 60-80 g/L of sodium hydroxide, 50-100 g/L of sodium chloride, 2-5 g/L of sodium oleate, 1-3 g/L of sodium thiosulfate, 5-10 g/L, EDTA 0.5-1 g/L of composite surfactant, 0.1-0.5 g/L of flocculating agent, 0.1-0.3 g/L of penetrating agent and the balance of water.

2. The alkaline bright sanding agent of claim 1, wherein: the composite surfactant is prepared by compounding alkylolamide and triethanolamine oleate according to the mass concentration ratio of 1: 1.

3. The alkaline bright sanding agent of claim 2, wherein: the alkanolamide is selected from one of coconut oil diethanolamide, coconut oil alkanolamide and lauric acid diethanolamide.

4. The alkaline bright sanding agent of claim 1, wherein: the flocculant is polyaluminium chloride.

5. The alkaline bright sanding agent of claim 1, wherein: the penetrating agent is a polyoxyethylene ether compound.

6. The preparation method of the alkaline bright sand surface agent as claimed in any one of claims 1 to 5, characterized by comprising the following process steps: mixing sodium hydroxide, sodium chloride and water uniformly at normal temperature, heating to 40 ℃, preserving heat, sequentially adding sodium oleate, sodium thiosulfate and EDTA, mixing uniformly, performing ultrasonic vibration treatment for 1-3 min, cooling to room temperature, adding a composite surfactant, a flocculating agent and a penetrating agent, and stirring uniformly to obtain a finished product.

Technical Field

The invention relates to the technical field of aluminum and aluminum alloy surface treatment, in particular to a sand surface agent.

Background

The traditional surface treatment process for aluminum and aluminum alloy comprises a plurality of pretreatment procedures, such as oil removal and dewaxing, water washing, brightening and acid etching, sand surface polishing, water washing and the like, and a plurality of working tanks are required to be arranged, so that the defects of complex procedures, high tank liquor preparation cost, unstable workpiece surface quality, low treatment effect controllability and the like exist. Meanwhile, the traditional bath solution for oil removal, dewaxing, brightening, acid etching and sand surface polishing has low surface treatment efficiency and poor environmental protection. Therefore, how to develop a multi-functional surface treating agent for aluminum and aluminum alloys is a great technical problem to be solved urgently in the industry.

Disclosure of Invention

The invention aims to provide an alkaline bright sand surface agent and a preparation method thereof, aiming at the defects of the prior art.

The technical scheme adopted by the invention is as follows: an alkaline bright sand surface agent comprises the following raw material components: 60-80 g/L of sodium hydroxide, 50-100 g/L of sodium chloride, 2-5 g/L of sodium oleate, 1-3 g/L of sodium thiosulfate, 5-10 g/L, EDTA 0.5-1 g/L of composite surfactant, 0.1-0.5 g/L of flocculating agent, 0.1-0.3 g/L of penetrating agent and the balance of water.

Specifically, the method abandons the prior formula of adopting nickel fluoride, ammonium bifluoride and nitric acid as the sand surface agent, adopts a fluorine-free and ammonium-free sand surface process, adds a multi-effect additive into the sand surface agent, adds sodium oleate, EDTA and a composite surfactant to endow the sand surface agent with the effect of improving the oil removal, wax removal and decontamination effects of the surfaces of aluminum and aluminum alloy, and simultaneously has the synergistic effect of a flocculating agent and a penetrating agent on the sand surface.

As a further improvement of the scheme, the composite surfactant is prepared by compounding alkylolamide and triethanolamine oleate according to the mass concentration ratio of 1: 1. Specifically, the composite surfactant disclosed by the invention has a high-efficiency oil and dirt removing effect on the surfaces of aluminum and aluminum alloy.

As a further improvement of the scheme, the alkylolamide is selected from one of coconut oil diethanolamide, coconut oil alkanolamide and lauric acid diethanolamide.

As a further improvement of the above scheme, the flocculant is polyaluminium chloride. Particularly, the flocculant has good dispersion performance with other raw material components, and the stability of the sand surface agent is further improved.

As a further improvement of the above scheme, the penetrating agent is a polyoxyethylene ether compound. Particularly, the penetrant has good dispersing performance with other raw material components, and the stability of the sand surface agent is further improved.

The preparation method of the alkaline bright sand surface agent comprises the following process steps: mixing sodium hydroxide, sodium chloride and water uniformly at normal temperature, heating to 40 ℃, preserving heat, sequentially adding sodium oleate, sodium thiosulfate and EDTA, mixing uniformly, performing ultrasonic vibration treatment for 1-3 min, cooling to room temperature, adding a composite surfactant, a flocculating agent and a penetrating agent, and stirring uniformly to obtain a finished product.

Specifically, the invention effectively improves the dispersibility of each raw material component by limiting the adding sequence of each raw material component and adopting methods of heating mixing, ultrasonic vibration treatment and the like, thereby obtaining a product with good stability and being capable of being stored for a long time.

The invention has the beneficial effects that:

the formula of the sand finishing agent integrates the functions of oil removal, wax removal, alkaline corrosion and sanding, effectively simplifies the pretreatment process of surface treatment of aluminum and aluminum alloy, and can obtain aluminum profiles with good surface cleanliness and glossiness. The sand surface agent is non-toxic and phosphorus-free, does not contain strong acid and heavy metal ions, and is environment-friendly and pollution-free.

The preparation method is simple, efficient, energy-saving and environment-friendly, and is beneficial to large-scale industrial production.

Detailed Description

The present invention is specifically described below with reference to examples in order to facilitate understanding of the present invention by those skilled in the art. It should be particularly noted that the examples are given solely for the purpose of illustration and are not to be construed as limitations on the scope of the invention, as non-essential improvements and modifications to the invention may occur to those skilled in the art, which fall within the scope of the invention as defined by the appended claims. Meanwhile, the raw materials mentioned below are not specified in detail and are all commercial products; the process steps or preparation methods not mentioned in detail are all process steps or preparation methods known to the person skilled in the art.