Explanation of the anti-corrosion layer of the electric heating tape

　　The electric accompanies the tropical as the industrial field important temperature to maintain the equipment, its anticorrosive layer design and the quality directly relates to the product in the bad environment service life and the safety. In the chemical industry, ocean, food and other special application scene, electric accompanied by tropical facing corrosive gases, liquids and a variety of chemical media erosion threat, a set of perfect anticorrosion protection system to ensure that the equipment long-term stable operation of the key guarantee.

　　The modern electricity accompanies the tropical corrosion prevention technology has developed the multi-level, multi-material comprehensive protection scheme, provides the targeted solution for different industrial environment.

　　The core function of the electric accompanied by the tropical corrosion layer is to isolate the corrosive medium and the internal conductive element contact. High-quality anti-corrosion layer needs to have chemical inertness, mechanical strength and durability of the three characteristics. Common anti-corrosion materials include fluorine plastic, modified polyolefin, stainless steel, etc., each material has its own specific protection advantages and applicable scenes. Polytetrafluoroethylene (PTFE) in the fluoroplastics family has become the first choice for strong acid and alkali environments due to its excellent chemical resistance, which can resist almost all organic solvents and most highly corrosive chemicals, with a long-term use temperature of up to 260°C. The more economical fluorinated ethylene glycol (FEG) is also used as the first choice. The more economical fluorinated ethylene propylene copolymer (FEP) shows good cost performance in moderately corrosive environments, and its heat-shrinkage properties make it easier to install and construct.

　　The structural design of the corrosion protection layer is also crucial. It is often difficult for a single material to meet all the requirements of complex conditions, so modern high-end electric heating cables usually use a composite corrosion-resistant structure. Typical design includes internal anti-corrosion layer, reinforcement layer and external protection layer of three parts: the internal anti-corrosion layer directly in contact with the heating element, mainly to provide electrical insulation and basic anticorrosion; reinforcement layer using glass fibre braid or wire mesh, to enhance the mechanical tensile strength; the external protection layer is directly facing the environmental corrosion, the need to have the optimal weather resistance and chemical stability. In extreme environments such as offshore platforms, an additional stainless steel braid or aluminium foil composite layer is added to form a multi-protection barrier. This structure ensures both corrosion resistance and mechanical protection.

　　Special application scenarios put forward higher requirements on the corrosion layer. Food-grade electric heating tape must be approved by the FDA, the use of non-toxic and odourless polymer materials of special formulations, to ensure that no contamination of the food production environment. The pharmaceutical industry requires corrosion protection materials that do not shed particles and avoid contaminating clean rooms. In response to these specific needs, manufacturers have developed specially formulated crosslinked polyolefin materials, which are crosslinked by electron beam irradiation to enhance the material's performance to meet hygiene standards while maintaining good flexibility and temperature resistance. In petroleum refineries and other explosion-proof areas, the anticorrosion layer also needs to have anti-static properties, usually through the addition of conductive carbon black or metal powder to achieve static dissipation, to avoid the accumulation of sparks.

　　Anti-corrosion layer of construction technology also affects the final protective effect. High-quality anti-corrosion electric heating tape in the production process to undergo strict material pretreatment, precision extrusion moulding and multiple quality testing. Advanced co-extrusion process can ensure that the thickness of the anti-corrosion layer is uniform, free of air bubbles and impurity defects. For joints and terminals installed on site, special anti-corrosion tapes and heat-shrinkable sleeves are required for sealing treatment, and the anti-corrosion level of these auxiliary materials must match that of the main heating tape. In highly corrosive environments, additional anti-corrosion coatings or wrapped anti-corrosion mastic will be applied to form double insurance. A common misunderstanding is to think that as long as the companion tropical itself has anti-corrosion layer is enough, in fact, every detail of the installation process may become a corrosion breakthrough, must systematically consider the whole circuit of anti-corrosion measures.

　　Along with the progress of material science, the electricity accompanies the tropical corrosion prevention technology also in constant innovation. Nanocomposite anti-corrosion materials by adding nanoscale fillers, significantly improve the corrosion resistance and mechanical strength of traditional polymers; self-repairing anti-corrosion coating can automatically repair small cracks in the damaged; new ceramicised silicone rubber can be transformed into a ceramic protective layer at high temperatures to provide ultimate protection for the electric accompanied by the tropical. Intelligent anti-corrosion technology has also begun to apply, through the built-in sensors real-time monitoring of the integrity of the anti-corrosion layer, early warning of corrosion risk. These technological advances are constantly expanding the application boundaries of the electric accompanied by tropical, so that it can be capable of more demanding industrial environments.