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SEBF Corrosion and Wear Resistant Valves

SEBF Corrosion and Wear Resistant Valves

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"SEBF" corrosion-resistant and wear-resistant valve won the national patent, patent number: ZL03264436.1
Different kinds and specifications of valves are used on the pipelines of acids, alkalis, salts, oils, and waters. In order to solve the corrosion problems, materials such as rubber, plastic, stainless steel, and titanium alloys are generally used. The use effect in the condition is not ideal, and the lining rubber and the lining plastic protective layer are easy to cause the problem of layering and falling off during use. Stainless steel and titanium alloy valves have limited wear resistance and are expensive and costly. Therefore, we have developed SEBF coated valves, which have the following characteristics:
1. The bond strength between the coating and the steel is as high as 90 MPa, which is not achieved by the lining and lining, and solves the delamination problem.
2. The over-flow part adopts the overall protection method to solve the problem of joint leakage and corrosion.
3. The coating can be machined to meet the dimensional accuracy requirements of the components.
4. The coating is resistant to acids, alkalis, salts and other media. Common carbon steel can be used as a valve substrate instead of stainless steel or titanium alloy, reducing equipment investment.


The mechanical properties and chemical resistance of various types of SEBF coatings are listed in the following two tables.


The mechanical properties of SEBF series coated slant coating

Performance Unit Test results of various models Execution standard
Bond strength MPa 90 90 90 95 80 GB6329-89
Adhesion level 1~2 2 2 1 1~2 CAN/CSA-Z245.20
Shear strength MPa 43 43 43 45 43 ASTM D1002-72(83)
Impact strength J 18 18 12 19 12 ASTM G14-77
Flexural strength MPa 95 93   93 87 GB1042-79
Flexibility level 1 1 1 1 1 CAN/CSA-Z145.20
Wear resistance L/μm >3 >3.5 >3 >3 >3 ASTM D968-81
Hardness H 3 3 3 3 3 GB/T6739-86
Cathodic stripping mm 1.5 - 4 - - CAN/CSA-Z245.20


Chemical corrosion resistance of SEBF series coated inclined coatings

Medium Concentration% SEBF-4 SEBF-5 SEBF-6 SEBF-9
25℃ 60℃ 90℃ 25℃ 60℃ 25℃ 60℃ 90℃ 25℃ 60℃ 90℃
Sodium chloride solution Saturation
Sodium chloride solution 3.5
Sodium hydroxide solution 10 × ×
Sodium sulfate solution 30
Sodium carbonate solution Saturation
Sodium nitrate solution Saturation
Ammonia 20                
Sodium hypochlorite solution 25                
Sulfuric acid 5 ×  
Hydrochloric acid 10      
Hydrochloric acid 38                    
Acetic acid 1  
Phosphoric acid 20      
Boric acid 10            
Distilled water 20    
Transformer oil Saturation
Salt spray resistance
(GB) T171-91
After 1000 hours of continuous testing, the film is in good condition, with no blistering, cracking, and peeling.
It is the best grade for salt spray resistance.

Note: "○" indicates excellent coating performance, "△" indicates good coating performance, "×" indicates poor coating performance, and chemical corrosion resistance is determined according to GB/T 6554-2.14-86 national standard.







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