Wire cleaning

Flake Cad2 Pitting values on wires cleaned In Clarke s solution ... 

Immerse a copper plate or wire cleaned with emery paper into a 0.01 N solution of silver nitrate. What is observed What place does silver occupy in the electrochemical series of the metals ... 

The development of a cylindrical ultrasonic transducer or vibrator has revolutionized ultrasonic wire cleaning. The wire or narrow metal strip continuously passes through the ultrasonic source while being submerged in the cleaning solution with increased cleaning rate, improved cost effectiveness, and reduced pollution hazards [54,55,56]. 

Stirrer speed - the minimum speed used is usually that which keeps the wire clean and does not allow a fibre mat to form. Higher speeds can be used when endeavouring to match the retention achieved on a particular paper machine (on the original Britt Jars stirrer torque can also be varied). 

Fig. 6.43 State-of-the-art wire cleaning device (source Voith).

In the block diagram, the objects are connected to each other using wiring connector selected using tools palette. The wires must be drawn in such a way that they connect the output terminal of a control or a function node to the input terminal of a function node or an indicator. There are three basic operations that can be performed over the existing wires clean up wire, create wire branch, and delete wire branch. The clean up wire is used to ahgn the wires. Ctrl + B keys can be used remove broken wires. 

Some of the Group 2 metals burn with characteristic flame colours. It is the 2+ ions formed in the reaction that cause the colours. We can test for calcium, strontium and barium in compounds using flame tests. A nichrome wire, cleaned with concentrated hydrochloric acid, is dipped into a sample of the salt to be tested and heated in a non-luminous Bunsen flame ... 

Each newly cleaved mica surface is very clean. Flowever, it is known that mica has a strong tendency to spontaneously adsorb particles [45] or organic contaminants [46], which may affect subsequent measurements. The mica sheets are cut into 10 nun x 10 nun sized samples using a hot platinum wire, then laid down onto a thick and clean 100 nun x 100 nun mica backing sheet for protection. On the backing sheet, the mica samples can be transferred into a vacuum chamber for themial evaporation of typically 50-55 mn thick silver mirrors. 

Meanwhile, the organic compound can be prepared for analysis whilst the sealed end C (Fig. 72) of the Carius tube has been cooling dow n. For this purpose, thoroughly clean and dry a small tube, which is about 6 cm. long and 8-10 mm. w ide. Weigh it carefully, supporting it on the balance pan either by means of a small stand of aluminium foil, or by a short section of a perforated rubber stopper (Fig. 73 (A) and (B) respectively) alternatively the tube may be placed in a small beaker on the balance pan, or suspended above the pan by a small hooked wire girdle. 

Use the apparatus detailed in Section 111,20. Dissolve 100 g. (123 ml.) of methyl n-butyl ketone (2-hexanone) (Section 111,152) in 750 ml. of ether and add 150 ml. of water. Introduce 69 g. of clean sodium in the form of wire (or small pieces) as rapidly as possible the reaction must be kept under control and, if necessary, the flask must be cooled in ice or in running water. When all the sodium has reacted, separate the ethereal layer, wash it with 25 ml. of dilute hydrochloric acid (1 1), then with water, dry with anhydrous potassium carbonate or with anhydrous calcium sulphate, and distil through a fractionating column. Collect the fraction of b.p. 136-138°. The yield of methyl n-butyl carbinol (2-hexanol) is 97 g. 

Into a 1 litre round-bottomed flask, fitted with a double surface condenser, place 250 g. (277 ml.) of dry ethyl acetate (1) and 25 g. of clean sodium wire (2). Warm the flask on a water bath in order to start the reaction. Once the reaction commences, it proceeds vigorously and cooling of the flask may be necessary in order to avoid loss of ethyl... 

In some metal-forming operations such as rod and wire drawing, various surface treatments are appHed to the workpiece. These include descaling, cleaning the apphcation of lubricant carriers, and the use of lubricants (see Lubrication and lubricants). Descaling can be mechanical or chemical (pickling). 

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