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弹簧的典型工艺是什么?
文章来源:http://www.sdzbthc.com/ 发布时间:2021-12-13 浏览次数:
金属件在含加速剂的碱金属磷盐的酸性溶液中形成磷化膜的过程称为铁系磷化或无定形磷化。同重金属磷盐磷化液(PH:1.5~3)相比,其PH:6以下即可操作,两种溶液的成膜机理不同,无定形磷化膜由氧化铁(Fe203)和磷酸铁(FeP04 2H20)组在。
The process of metal parts forming phosphating film in the acidic solution of alkali metal phosphorus salt containing accelerator is called iron phosphating or amorphous phosphating. Compared with heavy metal phosphate phosphating solution (pH: 1.5 ~ 3), it can be operated below pH: 6. The film-forming mechanism of the two solutions is different. The amorphous phosphating film is composed of iron oxide (Fe203) and iron phosphate (fep04 2h20).
1磷化膜的特性
1 Characteristics of phosphating film
在钢铁上形成的无定形磷化膜是疏水性的,这种性质能降低漆膜的起泡现象,但防止腐蚀在漆膜下面扩张的性能差,因此,防护性能低于锌系磷化。但无认如何,远优于在裸露金属上涂漆。
The amorphous phosphating film formed on steel is hydrophobic. This property can reduce the foaming phenomenon of the paint film, but the performance of preventing corrosion from expanding under the paint film is poor. Therefore, the protective performance is lower than that of zinc phosphating. But no matter what, it is far better than painting on bare metal.
不锈钢弹簧
铁系磷化膜颜色范围大,如:灰色、兰绿、紫色、兰色等,膜很薄,膜重一般为0.2~1.0g/m2,因此这种膜特别适合做油漆底层,尤其是漆膜承受较大的机械变形,如板弹簧、螺旋弹簧、扭簧等。在不太恶劣的腐蚀环境下工作能满足防护要求。有时这种处理也用于工序间防护。
Iron series phosphating film has a wide range of colors, such as gray, blue-green, purple, blue, etc. the film is very thin, and the film weight is generally 0.2 ~ 1.0g/m2. Therefore, this film is especially suitable for making the paint bottom layer, especially the paint film bears large mechanical deformation, such as plate spring, spiral spring, torsion spring, etc. Working in a less severe corrosive environment can meet the protection requirements. Sometimes this treatment is also used for inter process protection.
2典型工艺流程
2 typical process flow
处理材料表面必须无锈,原则上不允许任何酸洗作业。最好的工艺流程为五步法:
The surface of treated materials must be free of rust. In principle, no pickling operation is allowed. The best process flow is five steps:
a)碱性脱脂:b)水洗;c)磷化;d)水洗;e)钝化水洗。
a) Alkaline degreasing: b) water washing; c) Phosphating; d) Water washing; e) Passivation water wash.
最常用的施工方法是喷液法,因为浸液法处理大多存在膜上形成粉状沉淀物。
The most commonly used construction method is the liquid spraying method, because the immersion method mostly forms powdery sediment on the membrane.
3磷化液控制
3 phosphating solution control
在生产过程中主要控制PH值(用试纸或PH计)、总酸度、游离酸度、碱度,总酸度和游离酸度测定与结晶磷化相同。碱度测定取10ml磷化液,以溴甲酚绿作为指示剂,用0.1N盐酸或硫酸溶液滴定至浅绿色为终点。滴定消耗的毫升数就是碱度的点数。
In the production process, the pH value (with test paper or pH meter), total acidity, free acidity and alkalinity are mainly controlled. The determination of total acidity and free acidity is the same as that of crystalline phosphating. For alkalinity determination, take 10ml phosphating solution, use bromocresol green as indicator, and titrate with 0.1N hydrochloric acid or sulfuric acid solution to light green as the end point. The number of milliliters consumed by titration is the number of alkalinity points.
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