In the metal processing and manufacturing industry, rust prevention is always a core link that cannot be avoided. Whether it is precision bearings, automotive parts, or molds, measuring tools and structural parts, from work in progress to final assembly, every metal product needs to deal with the erosion of humid air, hand sweat, acid and alkali atmosphere and other complex environments. Traditional rust prevention methods are often caught in a dilemma: the oil film with strong rust resistance is thick and sticky, and although it can effectively isolate moisture and oxygen, it brings a lot of trouble to subsequent cleaning, welding, painting and even assembly; while light and thin rust prevention products often lack weather resistance and cannot meet the needs of medium and long-term storage or shipping. How to find a solution that not only forms a uniform and dense protective layer on the metal surface, but also allows the next process to proceed directly without cumbersome degreasing? The Hank BS-400 series was born for this.
1. Thin layer, not simply "apply a little less"
Many workers will deliberately reduce the amount of anti-rust oil applied for the convenience of subsequent processing, resulting in discontinuous oil films and local rust spots. Hank BS-400 series focuses on "thin layer high efficiency" in formula design. It uses a special solvent carrier and polymer film forming technology. After coating, the solvent evaporates rapidly, leaving a semi-dry oil film with a thickness of only 5 to 15 microns on the metal surface. This oil film is not a thick and heavy oil in the traditional sense, but a dense, continuous and transparent protective barrier that is almost imperceptible to the naked eye. It feels dry to the touch, does not stick to the hand, and does not absorb dust. It is this "thin" and "dry" that creates unprecedented convenience for subsequent processing.
Second, long-term anti-rust, breaking through the boundaries of time and environment
Thin, by no means means that the protection is reduced. The Hank BS-400 series can form a directional adsorption layer on the surface of common metals such as steel, cast iron, galvanized parts, and aluminum alloys by adding a variety of composite rust inhibitors and corrosion inhibitors, which can effectively repel water molecules and corrosive ions. Under indoor uncovered conditions, the neutral salt spray test capacity can reach more than 48 hours; under standard storage conditions, the rust protection period is as long as 12 to 24 months; even in the face of high humidity shipping environment, it can be handled calmly with anti-rust packaging. For many export-oriented companies, this means that products can safely withstand long cross-border shipments without frequent re-oiling or worrying about rust claims upon arrival.
3. Post-sequence processing is not affected, eliminating the "oil removal" link
The most troublesome problem with traditional anti-rust oils is that when it comes to welding, painting, assembly and other processes, the oil film on the surface must be cleaned first. This not only increases the cost of oil removal equipment, cleaning agents and labor, but also may lead to quality problems such as welding pores and poor coating adhesion due to incomplete cleaning. The breakthrough value of the Hank BS-400 series is that its dry thin layer oil film has "no cleaning" characteristics for most subsequent processing.
Welding operation: The oil film is extremely thin and does not contain harmful components such as silicon and halogen. It gasifies rapidly at high welding temperatures, does not produce a lot of smoke, and does not interfere with arc stability. The weld is well formed, and there is no tendency to pores and slag inclusion. Especially suitable for carbon dioxide gas shielded welding and laser welding processes.
Painting process: Due to the low surface tension of the oil film and its dry state, the wetting and adhesion of the paint are not hindered. After actual production line testing, there is no need for pickling or phosphating before painting, and the ideal coating adhesion can be obtained only through simple degreasing. Some low-demand scenarios can be directly sprayed, which greatly shortens the process.
Assembly and inspection: The dry thin oil film has lubricity, which can avoid fretting wear or biting of metal parts during assembly. At the same time, the transparent and non-reflective film does not interfere with dimensional measurement, thread inspection and appearance inspection, and performs particularly well on automated assembly lines.
Stamping and machining: For parts that require further stamping or cutting, this layer of oil film can also play a role in assisting lubrication, reducing die wear, and the cutting fluid can normally wet the surface of the workpiece without the failure of the processing fluid caused by oil-water separation.
Fourth, green environmental protection, improve the working environment of the workshop
Hank BS-400 series uses environmentally friendly solvents, does not contain harmful aromatic hydrocarbons such as benzene and xylene, has a mild smell, and is extremely low irritation to the operator's respiratory tract. Its flash point is high, and it is safer to store and use. At the same time, due to the extremely thin film layer, the coating amount per unit area is only one-third to one-fifth of the traditional anti-rust oil, which means that when packaging and transporting the same volume of parts, the amount of anti-rust oil is greatly reduced, which not only reduces material costs, but also reduces VOC emissions. In today's increasingly strict environmental regulations, choosing the BS-400 series is a plus for the sustainable competitiveness of enterprises.
Wide range of applications and flexible operation methods
This product is suitable for a variety of metal materials, including carbon steel, alloy steel, stainless steel, copper, aluminum and its alloys. In terms of use, it can be operated by conventional methods such as dipping, spraying, brushing, etc., as well as ultrasonic-assisted coating and electrostatic spraying production lines. Whether it is local protection for large structural parts or overall oil dipping for precision small parts, the BS-400 series can be leveled and dried quickly in seconds, without hanging or piling, and the edges and dead ends are also evenly covered.
For many factories, changing the anti-rust process is not easy, but the comprehensive benefits of the Hank BS-400 series are obvious: eliminating the cleaning line, reducing the floor space, reducing the burden of wastewater treatment, and improving the primary yield of the subsequent process. From "rust prevention for rust prevention" to "rust prevention for processing", this is not only an upgrade at the product level, but also a shift in manufacturing thinking.
6. Real use experience: from "afraid of sticky oil" to "active coating"
In an automotive parts processing company, the workshop supervisor once said that in the past, workers were the last to apply anti-rust oil to finished parts, because the oily surface was not only dirty, but also easy to scratch the positioning reference surface before assembly. Since switching to the Hank BS-400 series, the surface of the parts hardly feels grease, and it does not leave obvious oil stains on the hands when taking them. What is even more surprising is that an ultrasonic cleaning machine was originally required to remove oil before assembly. Now this process is directly eliminated, and the residual dust can be assembled by blowing only an air gun. According to the company's annual output of about 1.20 million pieces, the annual cost of cleaning agent is saved by nearly 300,000 yuan, and the customer complaints caused by oil pollution are almost zero.
VII. Technical parameters and storage recommendations
In order to help engineers accurately evaluate, the key technical reference values of the Hank BS-400 series are listed here: Appearance is light yellow transparent liquid; Density (20 ° C) is about 0.78g/cm ³; Viscosity (40 ° C) is about 2.5mm ²/s; Flash point (closed cup) is greater than 40 ° C; Salt spray test (35 ° C, 5% NaCl) ≥48h; Film thickness 5~ 15μm; Drying time (25 ° C) ≤5 minutes. The product should be stored in a cool and ventilated place, away from fire sources and oxidants. After opening the lid, it needs to be sealed in time to avoid changes in viscosity caused by solvent volatilization. The shelf life is 24 months in an unopened state.
Frequently Asked Questions
Q: Will BS-400 series anti-rust oil affect subsequent laser cutting or plasma cutting?
Answer: No. The oil film is extremely thin and does not contain benzene or halogen compounds. It burns out quickly under the action of the high temperature of the laser beam, and does not produce attached carbonized residues. The cutting surface is clean.
Q: Is the product suitable for galvanized sheet?
Answer: It is suitable for galvanized sheet, electroplated sheet and blackened parts, but it is recommended to do small batches of test pieces first to confirm compatibility, especially for special surface treatments such as passivation films.
Q: Does the anti-rust film need to be reapplied regularly?
Answer: Under the condition of indoor drying and no mechanical erasure, it is not necessary to reapply frequently. If it is exposed to water for a long time or frequently, the recoating cycle should be shortened according to the actual conditions.
Q: Is the cost higher than that of traditional anti-rust oil?
Answer: The price of a single barrel may be slightly higher than that of ordinary anti-rust oil, but since the dosage is only one-third of that of traditional products, the comprehensive cost is lower, and the cost of cleaning can be saved later.
Conclusion: Let rust prevention become the "invisible assistant" in the manufacturing chain
In the pursuit of efficient, intelligent and green modern manufacturing industry, no single process should become a bottleneck restricting the overall efficiency. Hank BS-400 series thin layer long-lasting anti-rust oil, with its extremely thin film, reliable anti-rust ability and excellent post-processing compatibility, is redefining the standard of metal anti-rust. It is no longer a greasy protective shell that is a headache, but an "invisible assistant" integrated into the production process - silently guarding the metal surface from rust, and quietly making welding, painting and assembly smooth and unobstructed. Choosing the BS-400 series is to choose a smarter and more worry-free anti-rust solution.
If you are troubled by the contradiction between metal rust prevention and subsequent processing, you may wish to try to introduce the Hank BS-400 series into your production line. Let rust prevention no longer be a burden between processes, but a reliable guarantee of product quality and efficiency. We believe that a small process improvement is enough to bring surprising benefits.
