We generally use the most popular methods for plating, hot-dip galvanizing, and mechanical plating on the appearance of the Railway Fastening. The process of forming a covering layer on the appearance of the fastener, after the appearance of the fastener, can show more Beautiful appearance, the corrosion resistance of the fastener itself will also be improved. The more important intention is to make the fastener itself have anti-corrosion ability, in order to add the reliability and adaptability of the fastener application, so the quality of the appearance of the fastener is judged, and the most important thing is to check the fastener's anti-corrosion ability. Whether it is useful to add, and whether the added range meets the expected requirements. As a Railway Fastening System Manufacturer, share with you.
1, Hot-dip galvanizing of fasteners
Hot-dip galvanizing of fasteners is to immerse fasteners made of carbon steel in a bath of molten zinc with a heat of about 510 ° C. In this way, the iron-zinc alloy on the surface of the fasteners will be transformed into passivated zinc, and then Obtain appearance processing. The price of hot-dip galvanizing treatment of fasteners is higher than that of electroplating, which is about 1.5 to 2 yuan per kilogram.
2, electroplating of fasteners
The electroplating of fasteners refers to immersing the parts to be electroplated in a specific aqueous solution. The aqueous solution will contain some accumulated metal compounds. After the current passes through the aqueous solution, the metal substances in the solution are separated and attached On the immersion part of the fastener. The plating of fasteners generally includes zinc plating, copper, nickel, chromium, copper-nickel alloys, and the like.
3.Mechanical plating of fasteners
Mechanical plating of fasteners refers to the use of coated metal powder to impact the appearance of fasteners through specific physical and chemical means. Processing effect. The mechanical plating of fasteners is mainly applicable to spare parts such as screws, nuts and washers.
Anchor Bolt's inspection request:
(1) The orientation, elevation and length of the exposed foundation bolts of the embedded anchors shall be in accordance with the requirements of the Sting diagram.
(2) The nuts and washers of the anchor bolts are matched, and the threads and nuts of the embedded anchor bolts should be maintained in good condition.
(3) The T-shaped anchor bolt and the foundation plate shall be used in accordance with the specifications. The foundation plate with the T-shaped anchor bolt embedded shall be firm and level, and the bare bolts and the foundation plate shall be painted with anti-rust paint.
(4) The strength of the foundation concrete where the anchor bolts are installed shall not be less than 10 MPa, and the cracks on the foundation concrete or reinforced concrete shall not use the anchor bolts.
Our company also has Anchor Bolt on sale, welcome to consult.