Steel Pills teaches you how to protect the corrosion of chemical equipment. The anti-corrosion of chemical equipment should start from the design stage. In the design stage of the equipment, full experience and knowledge about corrosion and corrosion control should be fully utilized to design good performance and long service life. Economical and safe equipment and devices. Such equipment can meet the needs of the process, as well as ensure long service life and reduce production costs. Specifically, the anti-corrosion design can be roughly divided into four stages from design to operation: anti-corrosion measures during design, anti-corrosion measures during manufacturing, anti-corrosion measures during equipment installation, and anti-corrosion measures during equipment operation.
First, the anti-corrosion design includes the strength design, the correct anti-corrosion structure design, the material selection and the choice of anti-corrosion protection methods. Secondly, the manufacturing quality has a great influence on the corrosion of the equipment. Some materials are good in terms of corrosion resistance, but they are manufactured. The quality does not meet the requirements, and the equipment will not achieve the expected anti-corrosion effect. The manufacturing should be fully considered in the process of processing, assembly and manufacturing processes including corrosion prevention; in addition, the installation quality directly affects the performance of the equipment, and incorrect installation will result in changes in fluid flow and flow rate in certain environments. It also causes stress corrosion cracking. The anti-corrosion measures during installation mainly include anti-corrosion problems during packaging, transportation, construction and assembly. In the installation process, special attention should be paid to the characteristics of non-metallic materials such as brittleness and low strength. Finally, the anti-corrosion measures during equipment operation include normal operation. Anti-corrosion management at the time, early elimination, maintenance, maintenance, monitoring, anti-corrosion management during driving and parking. After a long period of business practice, Steel Maru has summarized the following situations:



(1) Avoid the appearance of dead ends.
Partial liquid residue or solid matter sedimentation and accumulation in the equipment not only locally concentrates or accumulates during the operation of the equipment, causes corrosion, and causes corrosion when the equipment is stopped. When designing, try to avoid dead zones and dead zones that are not drained.
(2) Avoid the generation of gaps.
Many equipments are prone to gaps, and crevice corrosion is likely to occur in places where liquid circulation is poor. For example, carbon steel, aluminum, stainless steel, "target=_blank> stainless steel, low-alloy steel, etc. have such a phenomenon. Pitting corrosion and stress corrosion cause greater damage, and good structural design is the best way to prevent crevice corrosion. The often problematic parts are sealing surfaces and joints. Since welding can avoid gaps in joints, therefore, Better than bolted connections.


2. Enhance the staff's awareness of anti-corrosion:
Steel Maru said: Establishing mechanical enterprise engineering personnel and management personnel should pay attention to the effective mechanism of enterprise anti-corrosion work while paying attention to enterprise production, so that they should prevent the corrosion of the equipment belonging to the enterprise while arranging production and guiding production. Arrange and check at the same time. Only from the ideological and organizational implementation, anti-corrosion can really start from the source, to achieve prevention and prevention.


3. Rational use of anti-corrosion coatings:
Anti-corrosion coating method is another important method for mechanical equipment "target=_blank> mechanical equipment to prevent corrosion during use. Its main functions are reflected in the following aspects:
First, it has a strong shielding effect, which can effectively prevent the contact between the corrosive medium and the material, and can effectively block the passage of the corroded battery, and the resistance is increased to some extent.
Second, the anti-corrosion coating has a certain slow-corrosion effect, for example, some pigments and other film-forming or moisture reaction, etc., have a mitigating effect on the corrosion of metal materials of chemical machinery.
Third, it has a corresponding cathodic protection. The electrode potential of the paint film is lower than that of the bottom material metal, and it can be sacrificed as an anode in a corroded battery, which has a protective effect on the substrate metal.



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