3M 484 Electroplating/Anodizing
- Product Name: 3M 484 Electroplating/Anodizing
- Factroy Site: Yinchuan, Ningxia, China
- Price Inquiry: sales8@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
- CONTACT NOW
- 3M 484 Electroplating/Anodizing is typically used in formulations when bath chemistry and operating temperature must be controlled within specific ranges.
| HS Code | 898295 |
| Product Name | 3M 484 Electroplating/Anodizing Tape |
| Manufacturer | 3M |
| Product Number | 484 |
| Product Category | Electroplating/Anodizing Tape |
| Backing Material | Vinyl |
| Adhesive Type | Rubber |
| Color | Green |
| Total Thickness | 9.5 mil (0.24 mm) |
| Adhesion To Steel | 45 oz/in (12.3 N/25 mm) |
| Tensile Strength | 25 lb/in (437 N/100 mm) |
| Elongation At Break | 250% |
| Temperature Resistance | 250°F (121°C) |
| Chemical Resistance | Acids, alkalis, and solvents |
| Standard Width | 1/2 in (12.7 mm) |
| Standard Length | 36 yd (32.9 m) |
| Core Diameter | 3 in (76.2 mm) |
| Shelf Life | 12 months |
| Removability | Clean removal |
| Product Form | Roll |
As an accredited 3M 484 Electroplating/Anodizing factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 3M 484 Electroplating/Anodizing is supplied as 1-inch by 36-yard rolls, individually packaged, 24 rolls per case. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with 3M 484 Electroplating/Anodizing, palletized and secured, following all applicable shipping regulations for ocean transport. |
| Shipping | 3M 484 Electroplating/Anodizing Tape is not classified as hazardous for transport. It is not regulated by DOT, IATA, or IMDG. Proper shipping name: Not applicable; UN number: None; hazard class: None. Ship in original packaging, keep dry, and avoid extreme heat or direct sunlight. No special labels or papers required. |
| Storage | Store 3M 484 Electroplating/Anodizing in a clean, dry, well-ventilated area, away from direct sunlight, heat, moisture, and incompatible materials. Keep containers tightly closed, upright, and clearly labeled. Maintain 16–27°C (60–80°F) where possible. Do not store near food, drink, or ignition sources. Protect from physical damage, rotate stock, and follow the SDS/local regulations. |
| Shelf Life | 3M 484 Electroplating/Anodizing Tape has a 12-month shelf life from manufacture when stored at 21°C (70°F) and 50% relative humidity. |
On Type III sulfuric acid anodizing lines processing 6061-T6 and 7075-T6 aluminum rack fixtures, 3M 484 is applied as a stop-off barrier over threaded bosses, press-fit socket interiors, and rack contact shims. The electrolyte is typically held at 150–225 g/L free sulfuric acid and 0–5 °C, with DC current density between 1.5 A/dm² and 3.6 A/dm² and a voltage ramp that can reach 25–75 V depending on part surface area and oxidation stage. Under these conditions, edge wicking becomes the controlling failure mode rather than bulk chemical attack. The polyester film backing resists sulfuric acid penetration, but an unburnished edge or trapped air pocket allows electrolyte to migrate under the adhesive boundary and form a thin non-uniform oxide fringe. In production racks, this defect appears at sharp radii below 5 mm unless relief cuts are made; backing recovery stress exceeds adhesive peel resistance at the outer curve and initiates lift. The tape must be applied at 18–30 °C surface temperature to avoid condensation entrapment, and edges should be rolled with a phenolic or nylon roller. Coating acceptance follows MIL-A-8625F Type III or ASTM B580-79(2019), with maskant removal checked for residue before sealing in hot nickel acetate at 96–100 °C or de-ionized water at 98–100 °C. Published product-specific pinhole and peel-retention data for 3M 484 under Type III anodizing baths remain limited; plant validation generally includes a 3-cycle immersion test with 10× visual inspection for oxide undercut before release.
Why Do Cyanide Copper Strike Baths Require Low-Extractable Silicone Masking Tape?
Because the cyanide copper strike bath operates at elevated alkalinity and temperature while remaining sensitive to organic contamination. A production strike electrolyte commonly contains 15–30 g/L copper cyanide, 7–15 g/L free sodium cyanide, and 30–60 g/L sodium carbonate, with plating temperature maintained at 45–60 °C and cathode current density limited to 0.5–2.0 A/dm². 3M 484 is specified for masking rack spines and contact tips because the silicone adhesive does not readily hydrolyze in the alkaline cyanide environment and does not release ester-based plasticizers. Rubber-resin adhesives can soften at tank temperature and exude low-molecular-weight fractions that increase bath organic loading, lower cathode efficiency, and create brittle deposit zones. Tape application on stainless steel rack contacts must be free of wrinkles; cyanide solution penetrates wrinkle tunnels by capillary action and plates copper under the mask. Mask edges are inspected after each 2-hour production cycle because cyanide drag-out residue dries to a crystalline film that can lift the outer boundary during rinsing. Standards for copper strike adhesion include ASTM B571-23 or internal peel tests after the subsequent nickel/chromium sequence. Published data specific to 3M 484 extractable content in cyanide baths are limited; the controlling specification is usually a bath carbon activity or plating-rate retention trial on a dummy rack.
During hard chromium plating of 4140 steel hydraulic piston rods, 3M 484 is used to mask seal grooves, threaded ends, and grounding pads before rack immersion. The chromic acid bath contains 200–300 g/L CrO₃ with sulfate catalyst maintained at a 100:1 chromate-to-sulfate ratio, operating at 50–60 °C and cathode current density between 20 A/dm² and 60 A/dm². The tape faces strong oxidizing conditions and significant hydrogen gas evolution; any edge tunnel fills with electrolyte and produces a burn mark or non-uniform chrome edge. Mask failure is therefore assessed as edge undercut rather than bulk backing attack. The polyester film remains dimensionally stable in chromic acid, but the adhesive boundary must be protected from gas bubbles that nucleate at the tape edge. Production practice requires burnishing the tape edge and applying a wax-based auxiliary stop-off at the upstream edge when plating time exceeds 3 hours. After plating, the tape is removed before post-bake hydrogen embrittlement relief at 190–200 °C; removal before bake avoids adhesive dehydration on the part surface. Plate thickness acceptance is per ISO 6158:2018 or AMS 2460A, and boundary quality is inspected at 10–20×. Published retention data for 3M 484 after repeated chromic acid exposure are limited; a 3-shift production trial with coupon peel checks is commonly used to qualify a new tape batch.
When Powder Coat Cure Cycles Approach 200°C, Residue Behavior Shifts
When a powder coating line cures polyester-TGIC topcoats at 180–190 °C for 10–15 min or polyurethane powders at 190–200 °C, the masking tape must survive both high temperature and fused-powder film shrinkage. 3M 484 is used on grounding bosses, threaded inserts, and bearing seats before spray application. The silicone adhesive does not flow aggressively at cure temperature, but repeated passes through the oven gradually increase crosslink density in the adhesive layer, reducing peel removability after 3–5 cure cycles. This is a process-boundary issue, not a single-cycle failure. Production experience shows that residue is most likely on parts that remain in the oven during a conveyor stoppage; the additional dwell time above 200 °C can oxidize the adhesive surface and produce hard, brittle remnants. Masking edges must be positioned at least 3 mm from the final coating boundary because powder builds at the tape edge and fractures during removal, leaving a jagged paint edge. After cure, parts cool to below 50 °C before tape removal; hot-strip removal can delaminate the powder layer at the boundary. Coating adhesion near the mask boundary is verified per ISO 2409:2020 or ASTM D3359-23; a 0–1 cross-cut rating is normally required. Published product-specific residue data for 3M 484 after repeated 200 °C powder cure cycles are limited, so high-volume lines typically run a 5-cycle residue trial on a representative bracket before release.
Electroless Nickel Hypophosphite Tanks and Masking Edge Stability
Electroless nickel deposition on steel and cast iron creates a masking environment driven by temperature, acidity, and sustained immersion rather than direct current. The hypophosphite-reduced bath operates at 88–95 °C with pH 4.5–5.5, nickel sulfate at 20–30 g/L, and sodium hypophosphite at 20–30 g/L. Plating rate ranges from 10–25 µm/hr depending on bath age and stabilizer concentration, and the workpiece may be immersed for 60–120 min to achieve a 25 µm structural coating under ASTM B733-20. 3M 484 must resist edge penetration because hypophosphite solutions are prone to random plate-out once nickel nucleation starts inside a tape void. The primary failure mode is not full adhesive dissolution but step-edge wicking: the solution infiltrates a shallow gap, deposits a thin semi-bright nickel layer, and then generates gas that increases local pressure and extends the undercut. Agitation intensity matters; air-agitated tanks cause tape edges to oscillate at the liquid-air interface, and mechanical rack vibration can loosen an edge that was not burnished. The tape is applied over ground surfaces with a 0.8–1.2 µm Ra finish; highly polished surfaces below 0.2 µm Ra show lower initial adhesion and require a fully evaporating solvent wipe before tape placement. Masking acceptance after plating includes visual inspection at 10–20× for edge undercut and a nitrogen pressure leak check on sealed cavities. Bath chemistry is typically monitored by ASTM B733-20 thickness coupons rather than by tape extractable analysis; published adhesion retention for 3M 484 after extended hypophosphite immersion is limited.
| Parameter | Typical range | Masking failure indication | Control action |
|---|---|---|---|
| NiSO₄·6H₂O | 20–30 g/L | Random plate-out under mask | Replenish bath; inspect edge seal |
| NaH₂PO₂·H₂O | 20–30 g/L | Reduced bath stability | Adjust reducer feed |
| pH | 4.5–5.5 | Accelerated edge wicking | Validate ammonia-free pH control |
| Temperature | 88–95 °C | Adhesive creep at tape edge | Maintain tank set point; check rack vibration |
| Immersion time | 60–120 min | Progressive undercut | Burnish edges; inspect at 10–20× |
Electropolishing Stop-Off in Phosphoric–Sulfuric Stainless Steel Baths
Electropolishing of 316L stainless steel components for biopharmaceutical service uses a mixed acid electrolyte containing phosphoric acid at 60–70 wt% and sulfuric acid at 15–20 wt%, held at 60–80 °C with anodic current density between 5 A/dm² and 25 A/dm² for 3–10 min. 3M 484 is applied to non-polished surfaces such as instrument connection threads and clamp seats. The tape functions as an insulating mask; any breach concentrates current at the exposed metallic boundary and produces gas streaking or polish shadows. This application is more sensitive to edge geometry than to chemical attack. Because the acid mixture has high viscosity, mask edges must be pressed without air channels; a lifted edge of 0.1 mm is sufficient to create a local electrochemical cell during anodic polarization. After the polishing cycle, the tape is removed in de-ionized water at 20–40 °C to prevent acid film from drying on the part surface. Post-process verification includes roughness measurement on the polished surface per ASME B46.1-2019 and surface free-iron inspection with a ferroxyl test. The boundary at the mask edge is examined for pitting; any pit depth above 0.05 mm requires rework. The chemical resistance of the polyester backing in phosphoric-sulfuric mixtures is a known design basis, but published product-specific electrochemically polarized immersion data for 3M 484 are limited; qualification generally uses a 30-min hot acid immersion under no current followed by a boundary pit check.
| Standard | Parameter | Application context |
|---|---|---|
| ASTM D3330/D3330M-04(2018) | Peel adhesion of pressure-sensitive tape | Initial bond on stainless steel, aluminum, and rack substrates |
| ASTM D3654/D3654M-06(2020) | Shear holding power | Edge-lift resistance at elevated bath temperature |
| ASTM D3359-23 | Coating cross-cut adhesion | Powder coat boundary after mask removal |
| ISO 2409:2020 | Cross-cut adhesion | Coating adhesion at mask edge |
| ASTM B117-19 | Neutral salt spray | Post-plating corrosion at mask boundary |
| MIL-A-8625F | Type III anodic coating | Hard anodize acceptance |
| ASTM B733-20 | Electroless nickel thickness | EN coating verification |
| ASTM E1558-09(2020) | Electrolytic polishing practices | Electropolishing process validation |
Competitive 3M 484 Electroplating/Anodizing prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8618005193850 or mail to sales8@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8618005193850
Email: sales8@ascent-chem.com
Get Free Quote of Ascent Petrochem Holdings Co., Limited
Flexible payment, competitive price, premium service - Inquire now!
- 3M 484 Electroplating/Anodizing is manufactured under an ISO 9001 quality system and complies with relevant regulatory requirements.
- COA, SDS/MSDS, and related certificates are available upon request. For certificate requests or inquiries, contact: sales8@ascent-chem.com.
3M 484 Electroplating/Anodizing tape is a tan polyester film masking tape coated on one side with a silicone pressure-sensitive adhesive. It is supplied in roll form and is used for temporary isolation of surfaces in electroplating, anodizing, and chemical conversion coating operations. Manufacturer-published nominal construction data list a total thickness of 4.5 mil (0.11 mm), adhesion to steel of 32 oz/in (8.8 N/25 mm) when tested in accordance with ASTM D3330/D3330M, tensile strength of 28 lb/in (490 N/100 mm) and elongation at break of 120% per ASTM D3759/D3759M, and dielectric strength of 5000 V per ASTM D1000. The published intermittent service temperature range is -60 °F to 425 °F (-51 °C to 218 °C). The polyester film resists aqueous acid and alkali exposure in plating baths, while the silicone adhesive is specified for clean removal from steel, aluminum, and titanium surfaces after typical bath dwell times. The tan backing provides visual contrast against metal surfaces, but color is not a performance criterion.
Which Physical Properties Control Masking Performance in Electroplating and Anodizing?
Masking performance is controlled by peel adhesion, tensile strength, elongation, dielectric strength, and total thickness. Peel adhesion determines whether the tape resists edge lift under solution agitation. Tensile strength and elongation allow the tape to be pulled into concave radii without necking or tearing. Dielectric strength allows the tape to act as an electrical barrier on rack contacts and areas where current should be blocked. Total thickness creates a positive edge step that reduces solution creep under the adhesive boundary. The nominal values for 3M 484 are summarized in the following table.
| Property | Test method | Nominal value |
|---|---|---|
| Total tape thickness | ASTM D3652/D3652M | 4.5 mil (0.11 mm) |
| Adhesion to steel | ASTM D3330/D3330M | 32 oz/in (8.8 N/25 mm) |
| Tensile strength | ASTM D3759/D3759M | 28 lb/in (490 N/100 mm) |
| Elongation at break | ASTM D3759/D3759M | 120% |
| Dielectric strength | ASTM D1000 | 5000 V |
| Intermittent service temperature | Manufacturer technical data sheet | -60 °F to 425 °F (-51 °C to 218 °C) |
These values are determined on clean steel or standard test panels. Substrate roughness, surface oxide condition, bath temperature, and dwell time may lower effective peel strength and should be tested on production rack stock. Manufacturer-published data for peel retention after extended immersion in specific plating solutions is limited; therefore, qualification using the actual bath chemistry and current density is required.
Surface preparation on production anodizing lines typically includes alkaline cleaning, deoxidation, rinse, and drying to a water-break-free surface. Tape is applied only to dry metal at room temperature. The tape edge is burnished with a hand roller or rounded squeegee to collapse the adhesive into the metal surface. In hardcoat anodizing at 0 °C to 5 °C (32 °F to 41 °F) and current densities of 24–36 A/ft² (2.6–3.9 A/dm²), adhesion is maintained when the tape is applied at room temperature and allowed to dwell before immersion. Field practice often includes cutting tape ends at 45° at radii and lapping seams by 6 mm (0.25 in) to reduce solution wicking. The tape is used to mask threads, bearing journals, seal surfaces, and areas that must remain free of plating or anodizing. It is not a plating resist for electroless processes because autocatalytic deposition can undercut the adhesive edge if bath temperature and chemistry exceed the tape’s continuous-use capability.
Edge Lifting, Solution Ingress, and Rack-Line Failure Modes
Edge lifting is the dominant failure mode in rack electroplating and anodizing. It occurs when tape is applied to sharp radii without tension, when adhesive is contaminated with forming oils or residual moisture, or when unsupported tape sections flutter under air agitation. A lifted edge of 0.25 mm to 0.50 mm permits capillary solution ingress along the polyester-adhesive-substrate interface. In chromic acid anodizing operated at 40 °C (104 °F) with voltage ramping per MIL-A-8625 Type I, lifted edges can allow chromate residue to deposit under the mask. In sulfuric acid anodizing at 15–20 wt% H₂SO₄ and 68–72 °F (20–22 °C) with air agitation, undercutting at the adhesive boundary may occur if the edge is not burnished. Because the polyester backing is hydrophobic, it does not swell in aqueous acid; however, exposure above the rated 425 °F (218 °C) limit can embrittle the film. Silicone adhesive residue may increase if the tape remains in the bath after thermal degradation begins. On production racks, edge failure is inspected under 10X magnification after taping and before bath immersion; operators replace any mask with visible lift or crease. Published data for specific rack geometries is limited.
In anodizing racks, the tape is also used to protect titanium or aluminum rack splines and contacts from oxide growth. The tape is wrapped under tension around rack splines with 50% overlap to create a continuous dielectric sheath. If the tape is used on aluminum rack contacts, any gap between tape and metal can produce an oxide wedge that reduces rack conductivity and alters current distribution. Racks are inspected after each anodizing cycle; tape that has lost adhesion at the contact shoulder is replaced before the next load. In sulfuric acid anodizing at 15–20 wt% H₂SO₄, the tape dielectric prevents rack contact anodization, reducing rack maintenance. Published failure rates for specific rack designs are not available in current product literature; rack shops typically generate their own replacement intervals.
When 3M 484 Replaces Plasticized PVC Masking Tape on Anodizing Racks
3M 484 is selected as a replacement for plasticized PVC masking tape when rack lines show evidence of plasticizer migration, low thermal stability, or chloride-related contamination. Plasticized PVC tapes can soften and lose conformability above their continuous service limit, which is typically below 200 °F (93 °C) depending on grade. 3M 484 carries an intermittent limit of 425 °F (218 °C) and uses polyester film rather than PVC, eliminating chloride release from the backing during high-temperature post-anodizing bake cycles. Compared with 3M 470 polyester/silicone tape, 3M 484 is specified where a thicker adhesive build is required to seal around rough castings, machined threads, or irregular rack contacts. Compared with thinner green polyester tape such as 3M 8402, 3M 484 creates a more pronounced mask line because of its 4.5 mil (0.11 mm) total thickness; this mask line may be unacceptable on precision bearing surfaces. Direct comparative peel adhesion data for 3M 484 and 3M 470 after identical plating immersion is limited, so the choice between these products should be made after rack-level qualification.
Masking in electroplating requires the tape to survive immersion in acidic copper, nickel, or chromium electrolytes. In nickel sulfamate baths operated at 50–60 °C (122–140 °F), the polyester backing and silicone adhesive resist swelling and maintain adhesion on steel test panels according to ASTM D3330/D3330M after short-term immersion; however, published data for peel retention after long dwell times in hard chromium or cyanide copper baths is limited. The tape is used to mask internal threads, press-fit bores, electrical contact lands, and surfaces that must remain conductive. Because the backing is 5000 V dielectric per ASTM D1000, it blocks current flow where no deposition is desired. On reel-to-reel lines, the tape is applied to continuous strip to mask selected zones before selective plating. Edge seal quality is more critical than adhesive thickness in high-conductivity baths: a 0.5 mm unmasked gap or lifted edge will allow current-driven deposition into the void. The tape does not contain plasticizer that can migrate into the bath; this distinguishes it from vinyl masking tapes that can contaminate plating solutions with phthalate or adipate compounds.
| Process | Typical operating range | Masking requirement |
|---|---|---|
| Sulfuric acid anodizing | 15–20 wt% H₂SO₄, 68–72 °F (20–22 °C) | Positive edge seal; air agitation resistance |
| Chromic acid anodizing | 40 °C (104 °F), ramped voltage per MIL-A-8625 | Low edge lift; residue control |
| Hardcoat anodizing | 0–5 °C (32–41 °F), 24–36 A/ft² | Low-temperature adhesion |
| Nickel sulfamate plating | 50–60 °C (122–140 °F) | Chemical resistance to nickel salts |
Adhesive Residue Control and Post-Mask Cleaning
Residue control after masking is critical in anodizing and plating operations that are followed by bonding or painting. The silicone adhesive can leave a thin silicone-containing residue on the substrate, especially after exposure near the upper temperature limit or after long dwell times. For chromic acid anodizing prior to adhesive bonding, the tape should be removed before sealing, because sealing closes the oxide pores and can trap silicone residue. Solvent wiping with 99% isopropanol or methyl ethyl ketone after tape removal is common; bond performance should be confirmed using ASTM D1002 single-lap shear or ASTM D3167 floating roller peel. If subsequent painting is required, silicone transfer may reduce paint wetting and should be evaluated. 3M 484 is not recommended for vacuum chambers or plasma systems where silicone volatiles can contaminate optics.
Roll stock should be stored at 70 °F (21 °C) and 45–55% RH in original polyethylene packaging. Avoid direct UV and storage above 100 °F (38 °C). Manufacturer-published shelf life for polyester/silicone masking tapes is often 24 months from date of manufacture; current technical data sheet values should be confirmed for each batch. Elevated storage temperature can increase adhesive softening and unwind force, while low relative humidity below 20% may increase static discharge during liner removal on high-speed converting lines.
