Application Advantages of PVDF (Polyvinylidene Fluoride) Tanks for Electroplating, Pickling & Hydrometallurgical Extraction

PVDF 槽體應用於電鍍、酸洗與濕式冶金萃取之優勢

With outstanding comprehensive performance, PVDF (Polyvinylidene Fluoride) has become the mainstream premium material for tank bodies under highly corrosive working conditions such as electroplating, pickling and hydrometallurgical extraction. It boasts prominent advantages over traditional materials including stainless steel, PP and FRP, summarized as follows based on practical working requirements.

PVDF（聚偏二氟乙烯）綜合性能極佳，現已成為電鍍、酸洗、濕式冶金萃取等高腐蝕工況下的高階主流槽體材料。相較不鏽鋼、PP、FRP 等傳統材質具備顯著優勢，以下依實務製程需求條列核心優勢。

1. Extreme Resistance to Chemical Corrosion, Compatible with Complex Liquid Systems

1. 超強耐化腐蝕，相容複雜藥液系統

This is PVDF’s core advantage for tank applications. The high bond energy of C-F bonds in PVDF molecules endows the material with strong chemical inertness. It can withstand long-term erosion from various strong acids including hydrochloric acid, sulfuric acid, hydrofluoric acid, nitric acid and chromic acid, as well as media such as electroplating solutions, passivation liquids, metallurgical extractants, salt solutions and strong oxidants.

此為 PVDF 槽體最核心的應用優勢。PVDF 分子碳氟鍵結能高，具高度化學惰性，可長期耐受鹽酸、硫酸、氫氟酸、硝酸、鉻酸等各類強酸，以及電鍍液、鈍化液、冶金萃取劑、鹽類溶液、強氧化劑等介質侵蝕。

In high-concentration mixed acid and chloride-containing corrosive environments, PVDF will not suffer pitting corrosion or perforation like stainless steel. It also outperforms ordinary PP and PVC; it can stably resist strong oxidizing acids without swelling, cracking or pulverization after long-term immersion. It perfectly adapts to multi-type liquid working conditions for pickling, electroplating and solvent extraction, drastically reducing the risk of tank leakage.

在高濃度混酸、含氯腐蝕環境下，不會像不鏽鋼產生點蝕與穿孔；性能遠優於一般 PP、PVC 材質，可穩定耐受強氧化酸，長期浸泡不膨脹、不龜裂、不粉化。完美适配酸洗、電鍍、溶劑萃取等多種藥液工況，大幅降低槽體滲漏風險。

Note: This material is not suitable for long-term service under high-temperature concentrated strong alkali conditions, yet it can be safely used in conventional electroplating, normal-temperature pickling and extraction systems.

備註：本材質不適用高溫濃強鹼長期工況，但一般電鍍、常溫酸洗、萃取製程均可穩定使用。

2. Excellent Temperature Resistance for Heating Processes

2. 耐溫性能優異，适配加熱製程

PVDF features a continuous service temperature range of -40℃ to 130℃. It withstands common heating processes and alternating hot-cold impacts in electroplating and pickling without softening, deformation or creep at high temperatures, and will not become brittle and crack under low temperatures.

PVDF 連續使用溫度範圍為 -40℃～130℃，可承受電鍍、酸洗製程常見的加熱工況與冷熱交替衝擊，高溫環境不軟化、不變形、不潛變，低溫環境不易脆裂。

In contrast, the continuous service temperature of PP tanks is generally below 95℃, prone to deformation and aging under high heat; the service life of ordinary plastic tanks is greatly shortened in heated chemical liquid environments. PVDF tank bodies enable continuous and stable operation for high-temperature pickling, heated electroplating and thermal extraction processes.

反觀 PP 槽連續耐溫僅 95℃以下，高溫易變形、老化，一般塑膠槽在加熱藥液環境下使用壽命會大幅縮短。PVDF 槽體可滿足高溫酸洗、加熱電鍍、熱萃取製程的長時間穩定運作需求。

3. Robust Mechanical Properties with Stable & Durable Structure

3. 機械性能堅實，結構穩定耐久

PVDF delivers excellent tensile strength, impact resistance and creep resistance, with a Shore D hardness of 78, balancing toughness and rigidity. Tank bodies can withstand external forces such as liquid agitation, workpiece hoisting and material friction without damage or deformation.

PVDF 具備優異的抗拉強度、耐衝擊與耐潛變特性，蕭氏 D 硬度達 78，韌性與剛性兼具。槽體可承受藥液攪拌、工件吊掛、物料摩擦等外力作用，不易損傷、變形。

Additionally, it has an ultra-low water absorption rate (＜0.03%), maintaining excellent dimensional stability under long-term liquid immersion and preventing weld cracking caused by water absorption expansion. Its overall service life exceeds 10 years, far longer than conventional plastic tanks, cutting costs from equipment replacement and production shutdowns.此外吸水率低於 0.03%，

長期浸泡藥液仍維持極佳尺寸穩定性，可避免吸水膨脹造成焊道龜裂。整體使用壽命可達 10 年以上，遠超傳統塑膠槽，有效降低設備更換與產線停機成本。

4. Dense & Smooth Surface, Easy Cleaning, Anti-Scaling & Guaranteed Process Quality

4. 表面緻密光滑、易清洗、防結垢，穩定製程品質

The inner wall of PVDF tanks is smooth and pore-free, making it hard for metal residues, salts and suspended solids in chemical liquids to adhere and form scale. This reduces manual cleaning frequency and lowers operation & maintenance costs.

PVDF 槽體內壁光滑無孔隙，藥液中的金屬殘留、鹽類結晶、懸浮雜質不易附著結垢，可減少人工清槽頻率，降低整體營運與保養成本。

Moreover, the material releases minimal precipitates. Standard grades meet general industrial anti-corrosion requirements, while customized high-purity grades control metal ion content down to PPM/PPB levels. No impurities will leach into electroplating or extraction liquids, avoiding compromised coating quality and extraction purity. It is ideal for precision electroplating and high-end hydrometallurgical production lines with strict cleanliness standards.

同時材料析出量極低，標準材質可滿足一般工業防腐需求，客製高純等級可將金屬離子析出控制在 PPM/PPB 等級，不會釋放雜質汙染電鍍液與萃取藥液，避免鍍層品質劣化、萃取純度下降，適用高潔淨規格的精密電鍍與高端濕式冶金產線。

5. Convenient Processing with Superior Sealing & Anti-Leakage Performance

5. 加工性佳，密封防滲性能優異

PVDF supports hot-melt welding and plate splicing, where welds integrate seamlessly with the base material, delivering far better tightness than FRP fiberglass (which easily suffers interlayer delamination and liquid seepage). It can be fabricated into large integrated tanks, special-shaped tanks and custom equipment with diversion structures.

PVDF 可進行熱熔對接與板材拼接，焊道與本體一體成型、無縫密合，密封性遠優於容易分層滲液的 FRP 玻纖槽。可製作大型一體式槽體、異型槽與客製導流結構設備。

PVDF tanks are lighter than metal alternatives for easier transportation, installation and maintenance. Complex anti-corrosion lining treatment is unnecessary, shortening the overall construction cycle.

PVDF 槽體相較金屬設備重量更輕，搬運、安裝、維護更為簡便，無需繁複的防腐內襯工程，大幅縮短整體施工時程。

6. Flame Retardant & Insulating with High Safety Factor

6. 阻燃絕緣性能佳，整體安全係數高

PVDF reaches UL94 V-0 flame retardant rating, self-extinguishing once away from flame for superior on-site fire safety. It also features excellent electrical insulation, effectively blocking electric leakage risks under live electroplating and electrolysis conditions, making it compatible with all types of electrically equipped electroplating and electrolytic tanks.

PVDF 原生達 UL94 V-0 阻燃等級，離火立即自熄，廠房防火安全性高；同時具備優異電氣絕緣性，可有效杜絕帶電電鍍、電解製程的漏電風險，適用各式帶電電鍍槽與電解槽設備。

7. Lower Comprehensive Operation & Maintenance Costs

7. 整體營運維護成本更低

Although the upfront procurement cost of PVDF sheets is higher than PP and FRP, its ultra-long service life, minimal maintenance requirements and zero leakage failures deliver lower total lifecycle costs. It is a cost-effective high-performance option for mass-production electroplating plants, pickling workshops and metallurgical extraction lines operating 24/7 under heavy-duty corrosive conditions.

雖然 PVDF 板材初始採購成本高於 PP、FRP，但憑藉超長使用壽命、超低保養需求、無滲漏故障特性，整體生命週期成本更低，最適合 24 小時連續運轉、高負載腐蝕環境的量產電鍍廠、酸洗廠與冶金萃取產線，為高 CP 值的高性能解決方案。