Specializing in the production of Favelay explosion-proof and anti-corrosion dehumidifiers | long-life dehumidifiers | anti-corrosion ceiling dehumidifiers

When using a dehumidifier to prevent moisture and dehumidification in some environments with acidic and alkali corrosive gases, you need to purchase a professional
< < : anti-corrosion dehumidifier
:,
: to extend the service life of the equipment It can withstand the corrosive attack of acid and alkaline gases and can be extended. So how to do a good job in dehumidifier
: anti-corrosion treatment of heat exchanger?
: Ms. Liu
: The material of the dehumidifier heat exchanger is generally aluminum fins for heat exchange, so that the ambient humid air flowing through the dehumidifier heat exchanger can fully contact the heat exchanger. , through cooling and cooling, the moisture in the humid air forms condensed water and is discharged, and the air is continuously circulated to achieve a dehumidification effect. Therefore, the anti-corrosion treatment of the heat exchanger mainly targets the metal coating on the aluminum fins. The stability after contact with acidic and alkaline gases determines the final service life of the dehumidifier after anti-corrosion treatment. The characteristics and applications of three metal coatings are listed below.
: Galvanizing
: After the metal surface is galvanized, zinc is relatively stable in dry air and does not change color easily. In water and humid air, it reacts with oxygen or carbon dioxide to form oxides, or Alkaline zinc carbonate film can protect zinc from further oxidation.

The galvanized layer generally undergoes passivation treatment
,
: after passivation in chromic acid or in chromate solution
,
: Since the formed passivation film is not easy to interact with humid air
,
: The anti-corrosion ability is greatly enhanced. Galvanizing is low cost, easy to process and has good results

: Chromium plating

Chromium is very stable in solutions of alkali, nitrate, sulfide and carbonate and in organic acids in humid atmosphere
/>,
: Easily soluble in hydrochloric acid and hot concentrated sulfuric acid
: Under the action of direct current
,
: If the chromium layer is used as an anode, it is easily soluble in caustic soda solution< br/>: Strong adhesion of chromium layer
,
: High hardness
,,
: Good wear resistance
,
: Strong light reflectivity
,
: It also has high heat resistance
,
: It does not discolor below
: ℃
,
: ℃ The above begins to oxidize
,
: The hardness drops significantly at ℃
: Its disadvantage is that it is hard and brittle
,
: It is easy to fall off
,
: It is more obvious when subjected to alternating impact loads
: and is porous

Metal chromium is easily passivated in the air to form a passivation film
,
: Therefore, the potential of chromium is changed

: Therefore, chromium becomes a cathodic coating for iron
: It is currently not ideal to directly plate chromium as an anti-corrosion layer on the surface of steel parts
, < br/>: Generally multi-layer electroplating
(
: Copper plating

: Nickel

: Chromium
)
: In order to achieve the purpose of anti-rust decoration
: Currently widely used in repairing dimensions, light reflection and decoration to improve the wear resistance of parts

: Nickel plating

Nickel has good chemical stability in the atmosphere and alkali solution
,
: not easy to change color
,
: at temperatures
: above ℃
,
: before being oxidized. Dissolves very slowly in sulfuric acid and hydrochloric acid solutions
,
: but easily soluble in dilute nitric acid
: easily passivated in concentrated nitric acid
,
: therefore has good Corrosion resistance
: The nickel coating has high hardness, is easy to polish, has high light reflectivity and can increase the appearance
: Its disadvantage is that it is porous
,
: In order to overcome This disadvantage
,
: Multi-layer metal plating can be used
,
: and nickel is the intermediate layer. Nickel is a negative plating on iron
,
: It is an anode plating on copper.

Nickel plating is usually used to prevent corrosion and increase appearance
,
: So it is generally used to protect decorative coatings
,
: On copper products Nickel plating is ideal for anti-corrosion
: However, since nickel is relatively expensive
,
: copper-tin alloy is often used instead of nickel plating
:.

Listed above are the process characteristics and differences of several metal surfaces for anti-corrosion treatment. When doing anti-corrosion treatment for the heat exchanger of the dehumidifier, attention should be paid to the acid and alkaline characteristics of the ambient air where the dehumidifier is located, combined with the acid and alkali tolerance and stability of the respective metal coatings. Due to the nickel plating anti-corrosion process, nickel is a relatively rare precious metal. At present, electroplating copper-tin alloy is widely used in the electroplating industry to replace nickel.
: Therefore, when purchasing
< < : Anti-corrosion dehumidifier
:, you should pay attention to the acidity and alkalinity of the ambient air. It is best to consult the Favelay manufacturer in detail. Specializing in the production of Favelay explosion-proof and anti-corrosion dehumidifiers | long-life dehumidifiers | anti-corrosion ceiling dehumidifiers
Company name:
Nanjing Favelay Electric Co., Ltd.
Sales specialist:
Liu Miss
Company phone number:
Sales hotline:
Technical hotline:
Company website
Company address:
Heyan Road, Qixia District, Nanjing City
No.
: All you need is a phone call
,
: We will do the rest
!
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