Galvanizing and Tinning: A Practical Treatise on the Coating of Metal with Zinc and Tin by the Hot Dipping, Electro Galvanizing, Sherardizing and Metal Spraying Processes, with Information on Design, Installation and Equipment of PlantsDavid Williams Company, 1916 - 350 halaman |
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Galvanizing and Tinning: A Practical Treatise on the Coating of Metal with ... William Thomas Flanders,John Calder,R D Foster Pratinjau tidak tersedia - 2015 |
Istilah dan frasa umum
allow alloy Ammonium chloride amount anodes apparatus arranged bars basket bottom brush BURNING FURNACE castings cathode cent chain chloride clean cold connected container cooling copper sulphate deposit dross drum electrical electro-galvanizing electrolyte finishing kettle flux galvanized sheets Galvanizing and Tinning galvanizing bath galvanizing kettle gear gray iron handling heat hot galvanizing hydrofluoric acid immersed inches lead acetate machine malleable iron metallic material method minutes molten zinc muriatic acid necessary obtained operation oxide pass perforated pickling placed plating pounds Preece test pyrometer re-tinning removed rinsing rollers rolling barrel rotated rust sal ammoniac sample sand blast shaft Sherardizing shown in Fig side solution spelter spray sprocket steel suitable sulphuric acid surface tank temperature thickness tion tray tube tumbling barrel vanizing vapor washed wire cloth zinc coating zinc dust zinc oxide Zinc sulphate
Bagian yang populer
Halaman 288 - As soon as the stronger solution is taken from the vessel containing the unfiltered neutralized stock solution, additional crystals and water must be added to the stock solution. An excess of cupric oxide shall always be kept in the unfiltered stock solution. (d) Quantity of Solution. Wire samples shall be tested in a glass jar of at least two (2) inches inside diameter. The jar without the wire samples shall be filled with standard solution to a depth of at least four (4) inches.
Halaman 289 - In the case of a failure of only one wire in a group of seven wires immersed together, or if there is a reasonable doubt as to the copper deposit, two check tests shall be made on these seven wires and the lot reported in accordance with the majority of the sets of tests. NOTE. The equipment necessary for the tests herein outlined is as follows : Filter paper.
Halaman 287 - ... parts, by weight, of crystals to 100 parts, by weight, of water. The solution shall be neutralized by the addition of an excess of chemically pure cupric oxide (CuO). The presence of an excess of cupric oxide will be shown by the sediment of this reagent at the bottom of the containing vessel.
Halaman 287 - The presence of an excess of cupric oxide will be shown by the sediment of this reagent at the bottom of the containing vessel. The neutralized solution shall be filtered before using by passing through filter paper. The filtered solution shall have a specific gravity of 1.186 at 65° F.
Halaman 288 - Samples. Not more than seven wires shall be simultaneously immersed, and not more than one sample of galvanized material other than wire shall be immersed in the specified quantity of solution. The samples shall not be grouped or twisted together, but shall be well separated so as to permit the...
Halaman 287 - Coating. The galvanizing shall consist of a continuous coating of pure zinc of uniform thickness, and so applied that it adheres firmly to the surface of the iron or steel. The finished product shall be smooth.
Halaman 10 - There are two general ways of embalming iron to prevent its decomposition, which might be called, respectively, the metallic and non-metallic methods. In the non-metallic method the artides are coated with an organic substance, usually oil, or varnish, the efficiency of which depends on its being more or less airtight; when coloring matter is added to the oil it becomes a paint, but I understand from authorities on the subject that a varnish free from pigments is preferable to anything else. The...
Halaman 288 - F. (reading the scale at the level of the solution) at the beginning of each test. In case the filtered solution is high in specific gravity, clean water shall be added to reduce the specific gravity to 1.186 at 65° F. In case the filtered solution is low in specific gravity, filtered solution of a higher specific gravity shall be added to make the specific gravity 1.186 at 65° F.
Halaman 308 - ... developing as soon as the coat breaks down. This rust may appear in small pin points which gradually extend, or it may appear generally over the surface of the article. When the coating is relatively thin and poor, rust may develop in from 2 or 3 hours to 24 hours, or longer. A better coat will last 2 or 3 days, but a well-applied coat of requisite thickness will last at least a week. If no rusting is developed in two weeks' time, it may safely be assumed that the life of the coating will be...
Halaman 289 - ... dry. Second. Immerse for one minute, wash and wipe dry. Third. Immerse for one minute, wash and wipe dry. Fourth. Immerse for one minute, wash and wipe dry. After each immersion the samples shall be immediately washed in clean water having a temperature between 62 deg.