The Health Rider Loosens CNC Lathe Parts

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CNC Machining or Not:CNC Machining

Type:Etching / Chemical Machining, Other Machining Services

Material Capabilities:Aluminum, Brass, Bronze, Precious Metals, Stainless Steel

Micro Machining or Not:Micro Machining

Place of Origin:Guangdong, China (Mainland)

Model Number:pg256

Material:Stainless Steel

Keyword:CNC Macining Parts

Service:Customized OEM

Standard:GB / DIN

Size:Customized Size

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Plastic bag / small box +outer carton +pallets

Delivery Time 7 days

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Surface state of the base metal Since the overpotential of hydrogen on the rough surface is smaller than the smooth surface, hydrogen easily precipitates on the rough surface and the deposit is not easily deposited. Therefore, improving the smoothness of the base metal can often improve the covering ability. In addition, if the matrix metal contains impurities with low hydrogen overpotential (such as carbon impurities in cast iron), hydrogen easily precipitates on these impurities and the deposited layer is difficult to deposit. If the overpotential of hydrogen on the base metal is less than the overpotential on the plating metal, more hydrogen gas will escape during the plating process immediately after the tank. If plating is applied locally at this time, hydrogen evolution is less and the current efficiency is high because the plating is applied first, which will reduce the dispersion ability. At this time, in order to plate uniform continuous plating, a large current density “impact” is often used at the beginning of power supply, so that the surface of the substrate metal is quickly plated with a layer of metal with a large hydrogen overpotential, and then the normal The current density is plated, which can eliminate the adverse effect of the base metal on the dispersibility and coverage。

First, electrolytic polishing

Carbon steel and low alloy steel are widely used in phosphoric acid. Chromium-type polishing solution. Its process specification is shown in Table 2-4-1. The anode is made of lead and the power supply voltage is 12V。

When preparing the solution, first dissolve the chromic anhydride, EDTA and oxalic acid with a small amount of water, then add the phosphoric acid and add the sulfuric acid under constant stirring. When calculating the amount of each component, the density of phosphoric acid and sulfuric acid used shall be determined first. According to the density, the mass percentage concentration shall be determined separately. Then, the requirements of the two components shall be calculated according to the following formula