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Robotic arm applying paint on car parts. Automotive paint is paint used on automobiles for both protective and decorative purposes. [1] [2] Water-based acrylic polyurethane enamel paint is currently the most widely used paint for reasons including reducing paint's environmental impact. Modern automobile paint is applied in several layers, with ...
Over time the galvanic anode continues to corrode, consuming the anode material until eventually it must be replaced. Galvanic or sacrificial anodes are made in various shapes and sizes using alloys of zinc, magnesium, and aluminum. ASTM International publishes standards on the composition and manufacturing of galvanic anodes. [10] [11] [12]
Corrosion of tap water pipes can be influenced by a number of factors such as the pH, buffering capacity, and hardness. [6] Methods of control include directly adjusting the pH, adding phosphates , silicates as an alternative corrosion inhibitor, or adding bicarbonates for buffer.
Very thin coatings similar to those produced by chromic anodizing are known as Type IIB. Thick coatings require more process control, [6] and are produced in a refrigerated tank near the freezing point of water with higher voltages than the thinner coatings. Hard anodizing can be made between 13 and 150 μm (0.0005" to 0.006") thick.
The electrodes are connected to a medium-voltage (1–35 kV) AC source. Electrode boilers can work on both single-phase and three-phase supplies. If DC voltage is used, electrolysis of water occurs, decomposing water into its elements H 2 at the cathode (negative electrode) and O 2 at the anode (positive electrode).
The primary electrochemical process which occurs during aqueous electrodeposition is the electrolysis of water. This can be shown by the following two half reactions which occur at the two electrodes: Anode: 2H 2 O → O 2 (gas) + 4H(+) + 4e(-) Cathode: 4H 2 O + 4e(-) → 4OH(-) + 2H 2 (gas)
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