Section
| HS Code | 649168 |
| Productname | 204-1(A)Substitute Type Antirust Oil |
| Model | 204-1(A) |
| Producttype | Substitute type antirust oil |
| Appearance | Brownish-red transparent liquid |
| Odor | Mild petroleum odor |
| Density | 0.85-0.90 g/cm3 at 20°C |
| Viscosity | 10-30 mm2/s at 40°C |
| Flashpoint | ≥40°C open cup |
| Pourpoint | ≤-10°C |
| Filmtype | Oily soft film |
| Filmthickness | 1-3 μm |
| Waterdisplacement | Pass |
| Saltsprayresistance | ≥24 h |
| Humidityresistance | ≥720 h |
| Corrosionprotectionperiod | 12-24 months indoor |
| Applicationmethod | Dip, brush, spray, or wipe |
| Operatingtemperature | 10-40°C |
| Shelflife | 24 months |
| Packaging | 18 L drum; 200 L drum |
| Storageconditions | Cool, dry, ventilated, away from ignition sources |
| Standard | Q/SH or equivalent |
As an accredited 204-1(A)Substitute Type Antirust Oil factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packed in 20 L sealed steel pails, labeled 204-1(A) Substitute Type Antirust Oil with lot and safety markings. |
| Container Loading (20′ FCL) | 204-1(A) Substitute Type Antirust Oil, packed and securely loaded in a 20′ FCL container for safe ocean transport. |
| Shipping | 204-1(A) Substitute Type Antirust Oil is typically shipped as non-dangerous goods in sealed steel drums or pails. Keep containers closed, upright, and protected from moisture, impact, and ignition sources. Store in a cool, dry, ventilated area; follow local transport regulations and the product SDS. |
| Storage | Store `204-1(A) Substitute Type Antirust Oil` in a cool, dry, well-ventilated warehouse away from heat, sparks, open flames, and direct sunlight. Keep containers tightly closed and properly labeled. Avoid contact with strong oxidizers and incompatible materials. Prevent leakage; use secondary containment where appropriate. Maintain good ventilation, clean floors, and spill-control equipment. Observe local fire and environmental regulations. |
| Shelf Life | Shelf life is 2 years from manufacture when kept in its original sealed container under dry, ventilated storage conditions. |
Cross-drilled galleries in axial piston pump cartridges retain water-soluble grinding coolant even after ultrasonic rinsing, and this residual fluid is the primary corrosion initiator during indoor storage. 204-1(A) substitute-type antirust oil is applied only after a two-stage vacuum dehydration module lowers relative humidity around the part baskets to ≤ 5% at 40 ± 2 °C. The baskets travel through a 2.4 m dip immersion zone at 0.9 ± 0.1 m/min, followed by a 45 s drain section. The oil is maintained neat without solvent dilution; replenishment is triggered when acid number exceeds 6.0 mg KOH/g or ash content exceeds 0.25 wt%, whichever occurs first in the weekly control sample. Film mass on 100 mm × 100 mm CR 1010 steel coupons is held between 2.0 g/m² and 5.0 g/m², verified by differential weighing. Release testing for these components uses ISO 9227:2022 neutral salt spray at 35 ± 2 °C with 5% NaCl solution; a 96 h exposure with no pitting at cross-drilled edges is the line-release criterion. Published data for 204-1(A) at this exact multi-lane configuration is limited; the cited acceptance windows are used as site-specific release targets and must be revalidated after any change in rinse chemistry. If film mass falls below 2.0 g/m², pitting initiates at drilled-edge intersections first; above 5.0 g/m², dimensional interference becomes measurable in spool-to-bore clearances of 5–10 µm. The end product is an assembled axial piston pump cartridge shipped in closed plastic trays to mobile hydraulic equipment builders. Operational boundary: retained alkaline cleaner with pH above 9 should be neutralised before oil application; otherwise the oil forms a viscous water-in-oil gel in gallery dead legs.
At coil winder exit temperatures between 55 °C and 70 °C, the solvent fraction in 204-1(A) flashes off rapidly. The film left on cold-rolled strip remains continuous when the electrostatic oiler holds strip temperature below 70 °C and deposition voltage between 80 kV and 100 kV. For strip widths up to 1500 mm, a dual-row electrostatic oiler configured with 0.8–1.2 L/min/m of strip width supplies the required film weight. Target film weight on interleaved coil is 1.5–3.0 g/m²; for exposed coil storage the line uses 4.0–6.0 g/m², verified on SPCC steel coupons by extraction and gravimetric analysis. The application is neat; viscosity at 40 °C is controlled below 40 mm²/s to prevent sling loss at the first tension reel. Coil packaged for automotive body panels is released after 48 h neutral salt spray per ISO 9227:2022; outer laps are sampled because they see the highest oxygen ingress. If strip temperature exceeds 70 °C, low-boiling solvent vaporises before wetting the surface and the resulting film thickness collapses below 1.0 g/m² on the strip centreline. End product is cold-rolled coil for roof and door outer panels; the oil is removed by alkaline degreasing before pressing. Limitation: direct over-oiling above 6.0 g/m² converts to carbon smut in subsequent batch annealing if the pre-anneal wash is bypassed.
Bulk fastener and stamped bracket lines that charge 204-1(A) directly after alkaline washing create the most demanding water displacement case. Residual moisture on component surfaces above 5 µL/cm² emulsifies the oil and produces a milky film that fails early in cyclic humidity. A two-stage air-knife at 0.5–0.7 MPa with 60 ± 5 °C air reduces surface water before the parts enter a 1.0 m immersion drain drum. The drum rotates at 4–6 rpm and the oil bath is held at 25–35 °C; dwell time is 20–30 s. The product is not diluted, and bath level is maintained by make-up oil only. Zinc-nickel plated fasteners with a topcoat of 204-1(A) are released by 96 h humidity cabinet per JIS Z 0236:2016, with no white corrosion on thread flanks. For infrastructure fasteners exposed to atmospheric corrosivity category C3 per DIN EN ISO 12944-2:2017, an additional 72 h neutral salt spray per ASTM B117-19 is specified on duplicate samples. End product is bulk carton-packed hex flange bolts. When VCI film liners are used, the VCI transfer rate must be checked against the oil barrier; excessively thick films above 8 g/m² may block volatile inhibitor migration and produce ring-shaped corrosion at tier-stacking contact points.
| Downstream class | Test condition | Acceptance criterion | Standard designation |
|---|---|---|---|
| Hydraulic spool cartridges | 35 ± 2 °C, 5 ± 1% NaCl fog | 96 h no pitting on cross-drilled edges | ISO 9227:2022 |
| Cold-rolled strip | 35 ± 2 °C, 5% NaCl fog on SPCC panels | 48 h no visible rust at 2.0 g/m² film | ASTM B117-19 |
| Zinc-nickel fasteners | 49 ± 1 °C, 95% RH | 96 h no white corrosion products | JIS Z 0236:2016 |
| Bearing rings | 40 ± 2 °C, 100% condensation | 240 h no staining on SUJ2 | ISO 6270-2:2018 |
| Wire rope | Cyclic fog/dwell 25–40 °C | 72 h no red rust on Zn-Al coat | ISO 9227:2022 |
When forged bearing rings are packed into VCI-free fibreboard cartons, long-term warehouse storage in unheated docks requires a film that resists acid vapour from adjacent wooden pallets. 204-1(A) is applied in a 3 m³ flood-and-drain batch chamber. The chamber pump delivers 150 L/min through full-cone nozzles for 30 s, with drain-off of 10 min before cartoning. Oil temperature is maintained at 35 ± 2 °C to keep kinematic viscosity below 25 mm²/s during flood. The resulting film weight on SUJ2 bearing steel is 3.0–5.0 g/m². Release testing follows ISO 6270-2:2018 constant condensation at 40 ± 2 °C for 240 h; no staining is allowed on inner ring raceways and bore surfaces. This is more stringent than the 96 h salt spray used for fluid components because bearing geometry traps condensate at ball-to-race contact lines. End product is hub unit bearing rings shipped to an automotive assembly plant. Operational limitation: if cartons are sealed before solvent evaporation, residual solvent condenses under the oil and creates dark staining on the cone backface; a 30–45 min open-air flash-off at 20–30 °C is required before lid closure.
Cold-drawn rope wire and pre-stretched elevator rope carry residual calcium-based drawing soap into storage unless the final die box is followed by a soap displacement stage. 204-1(A) can be applied at the take-up drum by a heated felt wick set at 40 ± 5 °C, depositing 2.0–4.0 g/m² on 3.5 mm wire. The wick system is preferred because the film must be evenly distributed around the circumference without causing strand-to-strand tackiness. For a seven-strand rope, the finished rope is run through a counter-rotating brush oiler at 5–8 m/min so that the oil enters the strand valleys but does not fill them. Acceptance is 72 h neutral salt spray per ISO 9227:2022 on zinc-aluminium coated wire; the criterion is no red rust, while white corrosion products on the Zn-Al layer are recorded separately due to galvanic coupling. If carryover of residual drawing soap exceeds 0.3 g/m², the soap reacts with the oil and forms a green paste at strand intersections; this is detectable as torque rise during spooling. End product is 8 mm diameter elevator rope. Limitation: zinc-aluminium coated wire should not be exposed to the oil at film weights above 6.0 g/m² because excess hydrocarbon film retains water at coating defects and accelerates white rust in ventilated containers.
Sea container shipments of machine tool skids and power transmission housings impose condensation loads that are not present in indoor storage. 204-1(A) is applied by airless spray at 0.7–1.0 MPa fluid pressure and 50–80 cm standoff distance, producing a 15–25 µm wet film on cast-iron and steel surfaces. The coating must be allowed 24–48 h at 15–30 °C before shrink wrapping or cross-laminated vapour barrier enclosure. If the film is wrapped before solvent evaporation, localised pooling occurs at the lowest skid edges and produces soft films that detach during unloading. Tapped holes, flanges and grease fittings are brush-touched after the main spray because spray shadowing leaves these areas below 1.0 g/m². Release testing for this class uses 120 h neutral salt spray per ISO 9227:2022 on cast-iron coupons; no visible red rust is accepted. End product is a fully assembled machining centre skid with exposed machined ways protected for a 30–60 day sea voyage. Incompatibility: the oil can swell open nitrile rubber seals on hydraulic manifold stubs; seals must be masked or removed before application.
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The model 204-1(A) Substitute Type Antirust Oil is a solvent-cutback thin-film rust preventive specified for dip, dip-spin, brush and low-pressure spray application to ferrous parts, ground bearing surfaces, cold-formed steel and selected nonferrous substrates after machining or aqueous cleaning. The formulation belongs to the solvent-deposited rust preventive class of ISO 6743-8 and is intended to replace older lanolin or oxidized petrolatum-based products where lower drag-out, thinner films and faster removal in alkaline wash lines are required. After carrier-solvent evaporation at 20–35 °C, the residual film is a non-tacky oily layer in the range of 8–15 μm on cold-rolled steel panels. The product is not a dry-film wax and is not qualified for continuous outdoor exposure; indoor storage with relative humidity not exceeding 70% is the standard operating boundary unless additional barrier packaging is used. The substitute-type designation also indicates that the inhibitor system is formulated to avoid the heavier grease-like deposit of traditional petrolatum rust preventives while maintaining short-term salt spray and humidity cabinet protection.
The product is applied undiluted. The batch release certificate should report kinematic viscosity at 40 °C, closed-cup flash point, water content, density, and salt spray or humidity cabinet results under the methods listed in Table 1. Because product specifications for this designation are not fully published in open literature, incoming inspections are normally based on the supplier certificate of analysis in combination with a reduced internal test panel; no single test result alone is sufficient for lot acceptance.
The primary difference is deposit weight and removal path. In typical production control, 204-1(A) Substitute Type Antirust Oil exhibits a kinematic viscosity at 40 °C of 8–15 mm²/s when measured by ASTM D445, whereas conventional petrolatum-based solvent-cutback rust preventives often range from 20–40 mm²/s. The lower viscosity permits uniform distribution over small-diameter bores, threads, and bearing cages in dip-spin equipment and reduces drag-out per basket load. Film thickness after solvent release is controlled at 8–15 μm, compared with 25–50 μm for heavy petrolatum films. In terms of inhibitor chemistry, the substitute type commonly uses calcium sulfonate or synthetic ester film formers rather than the high-ash or high-residue lanolin/oxidized petrolatum systems found in older grades; this reduces the amount of organic residue entering downstream heat treatment, but it also makes the film more sensitive to alkaline cleaner pH and bath contamination. Removability is faster: immersion in a silicate-free alkaline cleaner at 60–80 °C can produce a water-break-free surface within 3–5 min, evaluated by ASTM F22, while heavy petrolatum films usually require solvent pre-wipe or extended cleaning beyond 10 min. The substitute type is therefore selected for interstage operations in which components return to high-precision assembly after cleaning, not for long-term preservation where heavy films dominate.
Incoming inspection for 204-1(A) Substitute Type Antirust Oil should verify the properties in Table 1. The values are representative control limits for a solvent-cutback substitute-type rust preventive; the supplier certificate of analysis and the production batch protocol take precedence because published data for this specific model designation is limited in open literature.
| Property | Test method | Control band | Note |
|---|---|---|---|
| Kinematic viscosity at 40 °C | ASTM D445 | 8–15 mm²/s | Higher values increase film thickness in dip-spin; lower values reduce salt spray protection. |
| Flash point, closed cup | GB/T 261 | ≥ 40 °C | Solvent-rich bath requires local exhaust ventilation and lower explosive limit monitoring. |
| Water content | GB/T 260 | ≤ 0.05 wt% | Free water degrades water-displacing properties and promotes under-film corrosion. |
| Density at 20 °C | GB/T 1884 | 0.82–0.86 g/cm³ | Used for consumption accounting and dip tank inventory control. |
| Salt spray resistance | GB/T 10125 | ≥ 24 h | Polished 100 mm × 50 mm panels, 35 °C, 5% NaCl. |
| Humidity cabinet | ASTM D1748 | ≥ 168 h | Condensing humidity at 50 °C. |
| Film thickness after dip-drain | Gravimetric panel method | 8–15 μm | On cold-rolled steel, 60 s dwell, 10 min drain at 20–25 °C, balance resolving 0.1 mg. |
In production-scale dip-spin lines, the controlling variables are bath temperature, spin speed, dwell time, and drainage time. A typical setup operates at 20–30 °C bath temperature with a tolerance of ±5 °C, basket spin speed of 300–600 rpm, dwell time of 30–60 s, and drain time of 5–10 min before components transfer to racks or trays. The bath temperature tolerance is a critical threshold: at 15 °C the viscosity rises and the residual film can exceed 15 μm, causing oily puddling in recesses; at 35 °C the film can fall below 8 μm and salt spray protection on polished panels may drop below the 24 h requirement of GB/T 10125. Spin speed produces the same effect. Speeds below 300 rpm leave excess liquid that must drain from blind holes, while speeds above 600 rpm can create starved contact zones on bearing races.
Water contamination must be kept below 0.05 wt% by GB/T 260 because free water migrates to the bottom of the dip tank and is dragged onto parts, reducing water-displacing action and producing under-film corrosion. In machining plants, emulsified cutting fluid contamination above 2 wt% can destabilize the dried rust-preventive film and darken polished surfaces; coalescers or decanting are required. Filtration with 25 μm bag filters is recommended at the recirculation loop to remove swarf and abrasive particles. Baskets should be loaded to 70–80% of free volume to avoid air pockets in blind holes. Under these conditions, the film thickness on cold-rolled steel panels is 8–15 μm and salt spray resistance at 35 °C with 5% NaCl is not less than 24 h when tested per GB/T 10125.
Removal is performed by aqueous alkaline cleaning, not by dry wiping. A silicate-free alkaline cleaner at 2–5 wt%, 60–80 °C, and pH 9–11 removes the film from low-carbon steel within 3–5 min in immersion or spray washing. Spray pressure should be held at 0.2–0.4 MPa to avoid foaming and to reach internal bores. The cleaned surface is checked by ASTM F22 water-break-free evaluation. For phosphate conversion lines, residual oil must be reduced below 0.1 mg/cm² by solvent extraction, because higher levels inhibit zinc phosphate crystal formation and create uneven coating weight. The product is not a pre-paint or pre-powder coating; components must be cleaned before painting, e-coating, welding, or adhesive bonding.
Compatibility boundaries include the following. Do not apply to surfaces above 80 °C because the solvent flash point is a closed-cup value of ≥ 40 °C per GB/T 261, and solvent vapour accumulation in enclosed dip tanks requires local exhaust ventilation and lower explosive limit monitoring. Avoid contact with strong acids, oxidizing acids, and chlorinated cutting fluids. Nitrile and fluorocarbon seals may tolerate incidental contact, but continuous immersion in the liquid product should be qualified against ISO 1817. Selected copper alloys should be tested by GB/T 5096 copper strip corrosion before use, because the additive system is primarily designed for ferrous surfaces and may tarnish cuprous bearing cages if applied without verification. Compliance with REACH and RoHS must be confirmed on the supplier safety data sheet and customer-specific banned substance list; the substitute-type designation alone does not establish regulatory conformity.
Table 2 summarizes the operational differences between 204-1(A) Substitute Type Antirust Oil and the main classes it replaces or complements. The values are representative for indoor interstage storage and should not be used as outdoor exposure ratings.
| Characteristic | 204-1(A) Substitute Type | Conventional solvent-cutback type | Petrolatum/lanolin type | Water-displacing type |
|---|---|---|---|---|
| Kinematic viscosity at 40 °C | 8–15 mm²/s | 12–20 mm²/s | 20–40 mm²/s | 4–10 mm²/s |
| Film thickness after solvent release | 8–15 μm | 10–18 μm | 25–50 μm | 4–8 μm |
| Salt spray resistance | ≥ 24 h | 12–24 h | 48–96 h | 8–16 h |
| Humidity cabinet | ≥ 168 h | 96–168 h | ≥ 240 h | 24–72 h |
| Removal route | Alkaline cleaner 3–5 min | Solvent wipe or alkaline 5–10 min | Solvent degreasing usually required | Alkaline cleaner 2–4 min |
| Primary limitation | Not for outdoor exposure | Higher residue on recessed surfaces | Heavy film interferes with assembly | Low film thickness restricts salt spray life |
On bearing manufacturing lines, the oil is applied after final wash and drying, typically by dip-spin at 500 rpm for 20 s, then the rings and cages are palletized in ventilated trays. Indoor storage at 15–30 °C and relative humidity ≤ 70% preserves the surfaces for 6–12 months; if condensation or acid gas exposure occurs, the film should be inspected monthly and the storage area conditioned. On cold-rolled steel sheets, roll-coating or electrostatic oiling deposits 1–2 g/m² of liquid film, which is acceptable for transit intervals of 4–8 weeks but not for standing water or outdoor storage. For machined cast iron, the part must be dried to less than 0.1 wt% residual water before application because the thin film cannot displace water trapped in graphite porosity; otherwise localized corrosion appears under the film in humidity cabinet testing within 200 h. For engine components and transmission shafts, the film is removed before assembly by alkaline washing, and the parts are then coated with an approved assembly lubricant rather than relying on the rust preventive as a break-in lubricant. Published data for long-term tropical exposure of this specific designation is limited; therefore qualification under actual packaging conditions with ASTM D1748 humidity cabinet and GB/T 10125 salt spray is required before use outside the stated indoor storage boundary.
