Deep-coating

Monolayer studies were done on a polyester resin-impregnated fiber glass Langmuir trough, 15.1 X 85 cm and 5 mm deep, coated with paraffin. This arrangement was mounted on a lathe bed equipped with a variable speed motor with a tachometer feedback control which drove the Teflon sweeps at 0.65 cm/min, 1%. Surface pressure measurements were made with a platinum Wilhelmy plate coupled to a Cahn RG Electro-... 

Coating the support with the seeds is a critical task. Different strategies are proposed in the literature. The supports can be seeded by simple contact (deep coating for a few minutes) with a suspension of zeolite crystals at an appropriate pH, and subsequent washing to keep only a surface monolayer [51], Fig. 2 shows a thick layer of silicalite-1 seeds on (XAI2O3 support after 3 h contact with the seed suspension. 

Figure 2. Schematic of the present experimental arrangement. Polymer is deposited by spin coating onto glass wafer, polymer surface layer is doped with porphyrin by deep coating. Then the surface is scanned by focused laser beam, together with simultaneous mechanical movement of polymer film. Direction of the mechanical movement is given by arrow.

Molybdenum trioxide thin films can be easily grown by various deposition techniques rf-sputtering, thermal evaporation, flash evaporatiOTi, deep-coating, pulse-laser deposition (PLD), atomic layer deposition (ALD), etc. providing various forms of crystal chemistry by tuning the substrate temperatures, Ts, and/or the oxygen partial pressure, p(02), in the depositimi chamber [30, 31]. For example. 

Metal anodes using platinum and precious metal oxide coatings are also incorporated into a variety of designs of impressed current protection for pipeline and deep weU appHcations, as weU as for protection of condenser water boxes in power generating stations (see Pipelines Power generation). 

Internal surfaces of the pump show severe wastage (Fig. 17.13). The wasted region is free of corrosion products except for a small amount of soft, black material. Metal loss in this area was as deep as V2 in. (1.3 cm). The reddish coating partially covering the smooth area above the wasted zone in Fig. 17.13 was applied to mitigate corrosion. Where this coating is... 

A tank with a fixed cover of plain carbon steel for storing 60°C warm, softened boiler feed water that had a tar-pitch epoxy resin coating showed pits up to 2.5 mm deep after 10 years of service without cathodic protection. Two separate protection systems were built into the tank because the water level varied as a result of service conditions. A ring anode attached to plastic supports was installed near the bottom of the tank and was connected to a potential-controlled protection rectifier. The side walls were protected by three vertical anodes with fixed adjustable protection current equipment. 

Cathodic protection applications in fresh water include use of ferrite-coated niobium , and the more usual platinum-coated niobium . Platinised niobium anodes have been used in seawater, underground and in deep wells " and niobium connectors have been used for joining current leads Excellent service has been reported in open-seawater, where anodic potentials of up to 120V are not deleterious, but crevice corrosion can occur at 20 to 40V due to local surface damage, impurities such as copper and iron, and under deposits or in mud ... 

Mixed Metal Oxide Coated Titanium As an alternative to platinised titanium, these materials are finding increasing use in seawater and soil based deep well groundbed applications. 

Tin coatings are ductile and are able to contribute a lubricating effect in the deep drawing of steel. The presence of the thin alloy layer in flow-melted tinplate coatings does not impair this property appreciably but bright electrodeposited coatings may be less ductile than others. 

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