The application of vinyl resin anticorrosion performance in the automotive industry

Epoxy vinyl resin called anti-corrosion industry leader in many other ways also have applications, including automobile manufacturing. According to China epoxy resin industry association experts, vinyl ester resin can make all kinds of vehicle components, such as car tyre has also successfully with high strength and vinyl ester resin suppress, than metal tire weight 40 ~ 50%, from 160 ~ 200 ℃ in electrical equipment can be run continuously for more than 10 years and keep enough mechanical strength and dimensional stability. Epoxy vinyl ester resin has higher elongation have better shear strength, the impact of the higher than ISO polyester and good creep resistance and fatigue resistance, and good molding liquidity in the SMC parts making cars, the obtained compelling applications. Expert says, these components include wheel, seat, heat dissipation frame, gate board, engine valve sleeve, etc.

According to the China epoxy resin industry association experts introduced: sheet metal material on the total cost advantage integration is difficult, but many parts total amount is large, is the second placing signage at the noise, corrosion resistance is low; The appearance of the cast aluminum products quality is better than other non-ferrous metals, but the cost is higher, sound-absorbing, poor corrosion resistance; Thermoplastic composite materials (mainly glass fiber reinforced nylon) of superior machinability, short production cycle, but high temperature aging problems, poor durability, size is not stable and cause poor sealing.

So analysis think SMC and BMC is one of the ideal material for the valve set. Cytec Industries Inc Cyglas 695 BMC engine parts production, is a kind of vinyl ester resin containing 25% glass fiber BMC products, including the molding Cornette 5.7 L car cylinder valve cover, injection moulded a 4.3 L 12 gm truck before timing gear chain cover, injection moulded a 5.7 L 3 gm truck before timing gear chain cover, 2.7 L V6DOHC cylinder valve cover, etc.

Vinyl ester resin BMC cylinder valve cover, working temperature of 138 ~ 149 ℃, the curing speed (45 s curing products 3 mm thick, 1.4 ~ 1.8 kg of the valve cover, 1 min curing), good dimensional stability, good resistance to chemical corrosion. China epoxy resin industry association experts say the future, this kind of material to a wide range of applications in the field of transportation, mainly lies in the spare parts, including wheel, seat, heat dissipation frame, gate board, engine valve sleeve, etc

Activated alumina characteristic analysis

In the petrochemical industry, fertilizer industry , widely used as catalysts, catalyst supports . Activated alumina adsorption characteristics and thus used as a gas and liquid desiccants , adsorbents gas purification , drinking water fluoride removal agent , industrial wastewater color and odor eliminating agents.

Can be used with household fluoride in cylinder form a complete set, is the ideal drinking water fluoride removal equipment in the family. The fluoride in filter material can also be used with the waterworks fluoride removal equipment or industrial fluoride removal equipment systems. Household fluoride removal equipment fluoride in liao activation: configuration of aluminium sulfate solution (3 litres of water, 0.3 kg of solid aluminum sulfate), alumina fluoride in filter material to be included in the above solution, soak 5-10 hours abandon to immersion to appropriate mixing (soaked), then wash with clear water for 3 to 5 times, each time 2 liters of water, or mixed with PH reclamation, control the PH 7.5. Activated alumina fluoride in filter material can use 6 to 8 years in a row, when surface tan, fluoride in effect is significantly reduced, this is due to the water pollution of impurities, so it's best to every half an year is treated with dilute hydrochloric acid 3%, its operating method and the regeneration method is the same.

The main factors influencing the activated alumina fluoride agent is

Today mainly for everyone say affect activated alumina fluoride agent adsorption performance what element? . Activated alumina fluoride in a multiple porous spherical material, can have very strong adsorption function, large specific surface area, high compressive strength hardness, long service life, and can be used repeatedly through regeneration methods. This product is a white, spherical porous material non-toxic, odourless, not powder, insoluble in water. Widely used in petrochemical, chemical, textile, metallurgical and other industries of instrument air drying, can also be used for the iron and steel, petroleum cracking gas, PVC, propylene in the liquid phase and gas phase depth is dry. Understand the factors affecting activated alumina fluoride agent adsorption performance, to avoid the disadvantage factors, make active aluminum oxide better work.

(1) particle size: the smaller the particle size, the higher adsorption capacity, but the smaller the particle size, particle strength is lower, affect the service life.

2 raw water PH value: when the PH value is greater than 5, the lower the PH, the higher the adsorption capacity of activated alumina fluoride agent.

(3) initial fluoride concentration in the raw water, the higher the initial concentration of fluorine, adsorption capacity is bigger.

(4) raw water alkalinity: heavy concentration of carbonate ions in raw water, high adsorption capacity will reduce.

(4) the chloride ion and sulfate ion.

（5） the effects of arsenic: activated alumina fluoride adsorption for the arsenic in the water, the accumulation of arsenic in activated alumina fluoride agent on the falling of fluorine ion adsorption capacity, and make renewable elution arsenic ion more difficult.