Brass plating

Brass plating Brass wool Brassylic acid [505-52-2] Brassylic acid [505-55-2]... 

Another market appHcation for naphthenic acid is the tire industry, where cobalt naphthenate is used as an adhesion promoter (see Adhesives Tire cords). Cobalt naphthenate improves the bonding of brass-plated steel cords to mbber, presumably by suppressing the de-zincification of brass (50). Its first reported use was in 1970 and the first patent for its use was issued in 1975 (51). About 900 t of cobalt naphthenate is used worldwide as an adhesion promoter, half of it in North America. The unit value fluctuates between 8.75—13.25 /kg because of the volatility of cobalt prices. Although it is the industry standard, the use of cobalt naphthenate is declining with the advent of more economical high metal-containing substitutes. 

Insoluble Sulfur. In natural mbber compounds, insoluble sulfur is used for adhesion to brass-coated wire, a necessary component in steel-belted radial tires. The adhesion of mbber to the brass-plated steel cord during vulcanization improves with high sulfur levels ( 3.5%). Ordinary rhombic sulfur blooms at this dose level. Crystals of sulfur on the surface to be bonded destroy building tack and lead to premature failure of the tire. Rubber mixtures containing insoluble sulfur must be kept cool (<100°C) or the amorphous polymeric form converts to rhombic crystals. 

The patented wire is again cleaned with acid, rinsed, and brass plated just before the second drawing. The brass acts as a drawing lubricant and as well as an adhesive to mbber. The brass composition is typically 60—70% copper with 2inc as the remainder. The patented, brass-plated wire is drawn into filaments of 0.15—0.38 mm diameter. 

Brass Plating," in Ref. 101, chapter with over 200 references. 

Flgure 13.2 Layer-type dezincification of a thin brass plate. The 0.019-in. (0.048-cm) plate is shown in cross section. The dezincified layers converge toward the plate edge. Note the porosity of the dezincified metal. 

The celluloid dough is then filtered by forcing through a pad of calico and brass gauze backed by a heavy brass plate at a press of about 1.5 tons per square inch. Any undesirable foreign matter is thus separated from the dough. 

Changes observed in the composition of the rubber/brass interphase correlated well with results of adhesion tests carried out on brass-plated steel wires embedded in blocks of rubber [46]. The force required to pull the wires out of the blocks decreased steadily as vulcanization temperature increased. This effect was especially pronounced when the specimens were aged at elevated temperature and humidity for several days before the wires were pulled out of the rubber blocks. 

Geon and Seo [47] also determined the effect of vulcanization time on the adhesion of natural rubber to brass-plated steel. For relatively short times, there was a peak at the end of the copper profile that corresponded well with a peak in the sulfur profile. Similarly, peaks in the zinc and oxygen profiles corresponded well. These results showed that copper sulfide and zinc oxide mostly formed at short times but some evidence for formation of zinc sulfide was also obtained. For long times, the peak in the sulfur profile no longer corresponded with that in the copper profile. Instead, the peak in the sulfur profile corresponded to the peak in the zinc profile. It was concluded that the formation of zinc sulfide increased substantially at long times. An increase in vulcanization time correlated well with a decrease in the force required to pull brass-plated steel wires out of rubber blocks. 

Messing-artigkeit, n. brassiness, -blatt, n. brass foil, -blech, n. sheet brass, brass plate, -bliite, /. aurichalcite. -brennen, n. brass making, -draht, m. brass wire. 

In recent years, there has been interest in using zinc as a power-impressed anode for the cathodic protection of steel in concrete. The zinc is flame sprayed onto a grit blasted concrete surface to a final film thickness of approximately 250 m. A primary anode is necessary. Early systems used brass plates as the primary anode, but more recent systems used platinised titanium or niobium wire anodes as the primary current conductor. 

I put the book back and move around the room. Here s the big group portrait The Solmani Press, Silver Jubilee, 1936, the brass plate says, shiny and faintly green around the edges with polishing. Grandpapa—William Pryor—standing beside Grandmama in... 

The mill cake taken from the mill is broken by passing between toothed gunmetal rolls to produce powder, which is then pressed between brass plates in a hydraulic press to a pressure of about 7 MPa, depending on the properties finally required. The purpose of the pressing is twofold. On the one hand it increases the intimacy of contact of the ingredients and improves the burning properties of the powder. On the other hand, it... 

Brassinosteroids, as natural plant growth regulators, 73 22-28 Brass mills, 7 671, 690 Brass plating, 9 766, 809-810 Braunite, 75 540 Bravais lattices, 8 114t Brazeability, copper wrought alloys,... 

In such an osmometer the lateral walls on the depth of the half cells are made up of perforated brass plates the width and the depth of each groove in the plate are 1.5 mm and the distance between two adjacent groove is also 1.5 mm. The diameter of osmometer cell is 11.5 cm. The semi-permeable membrane is clamped between the two half-cells. The solution is placed in the glass-tube having a needle-type stopcock and is fitted with pure solvent. The volume of the osmometer cell is about 7 ml. The assembled osmometer is put in a double-walled air thermometer. The temperature fluctuations in the thermostate are 0.05°C. 

The lateral surfaces of the osmometer cell are carefully ground with fine abrasive powders. It is very important that the wall surfaces of the cell be parallel. The semi-permeable membranes are applied to these surfaces and are tightly clamped with two ground brass plates, perforated with 1 -2 mm holes. The reference capillary shows the level of the solvent for this reason the inner diameters of two capillaries should be equal. 

Explosive Charge 2. Electric Detonator 3. Thin Brass Plate ... 

CaCl2 added) was used. Glass plates were used as SPHF, but steel, Al or brass plates were also tried. The thickness of the barrier was varied to control the intensity of the shock transmitted to receptor [See also under Detonation (and Explosion), Development from Deflagration]... 

CA 73, 89708q(1970) (Hydrodynamic Method for detg the relative efficiency of expls consisted of explns carried out in a chamber provided with a brass plate in the bottom and filled with water. The extent of deformation... 

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