In the field of metal processing, stamping and stretching are extremely common forming processes. Whether it is automotive sheet metal parts, home appliance shells, or precision electronic structural parts, it is inseparable from the shaping of stamping and stretching. However, the formed metal parts often face a common pain point: how to prevent rust? More importantly, after rust prevention, how to clean it easily? If the anti-rust oil is not selected properly, it will not only affect the subsequent welding, painting, and assembly processes, but also may greatly increase the production cost due to the difficulty of cleaning. Today, we deeply analyze the Hank BS-400 series anti-rust oil to see how it has become the trusted choice of many manufacturing companies with its two core advantages of "easy cleaning" and "no impact on stamping and stretching".
There is no doubt that the essence of anti-rust oil is metal rust prevention. But traditional anti-rust oils are often caught in a dilemma: the stronger the anti-rust performance, the thicker and more viscous the oil film, the more difficult it is to clean later; and in order to pursue easy cleaning, the anti-rust performance may be sacrificed, causing the workpiece to rust during turnover or storage. The Hank BS-400 series breaks this "either-or" deadlock through a unique formula design. It uses the synergy of polymer film-forming agents and high-efficiency corrosion inhibitors to form a dense but extremely thin protective film on the metal surface. This film can effectively isolate moisture, oxygen and corrosive media, providing anti-rust cycles that can last for months or even longer. But at the same time, the polarity of this layer of film has been specially treated, and the bonding force with the metal substrate is moderate, so that it will not form stubborn residues that are difficult to remove. In practical applications, customers use conventional degreasing agents, spray or ultrasonic cleaning at a temperature of about 50 ° C for a few minutes, and the oil film can be completely removed. The cleaned aqueous solution does not contain silicon or chlorine, and the environmental pressure is low. Waste liquid treatment is also simpler.
The characteristic of "does not affect stamping and stretching" is the essence of the Hank BS-400 series. Many anti-rust oils are applied before stamping, but due to the excessive friction or high viscosity of the oil itself, the wear of the die is increased, the surface of the workpiece is strained, and even the forming dimensional accuracy is affected. The Hank BS-400 series specially adjusts the lubrication component to make it have a certain degree of extreme pressure lubricity, which can reduce the friction heat between the die and the plate during the stamping and stretching process, and will not hinder the flow of metal due to the thick oil film. The actual test shows that under the same mold and stamping parameters, the forming force of the plate using the Hank BS-400 series is more stable, the rebound of the workpiece is small, and the surface quality is significantly improved. Especially for stainless steel, galvanized sheet, cold-rolled sheet and other materials, BS-400 performs well, not only preventing micro-rust during processing, but also ensuring smooth continuous stamping. In addition, the oil also has good shear stability, in high-speed stamping or continuous stretching operations, the oil film will not break due to severe shear, thus always providing stable lubrication protection.
From the actual production process, the efficiency improvement brought by the Hank BS-400 series is very intuitive. Take a medium-sized hardware stamping factory as an example. In the past, a certain brand of anti-rust oil was used. After the workpiece was offline, it needed to go through two cleaning processes: first high-temperature alkali washing, and then acid washing and neutralization, in order to meet the subsequent electroplating requirements. During this period, not only the energy consumption is high, but also the flange edge yellowing and welding pores often occur in parts that are not thoroughly cleaned. After switching to the Hank BS-400 series, the cleaning process is simplified to a medium-temperature degreasing, and because the oil film is easy to emulsify, the consumption of degreasing agent is reduced by nearly 30%. At the same time, since the oil does not affect the welding, some workpieces that do not need electroplating can even enter the assembly or spot welding process without cleaning, What makes the workshop managers even more satisfied is that the BS-400 series has a mild odor, is free of benzene and halogenated hydrocarbons, is friendly to operators, and meets increasingly stringent occupational health and safety requirements.
Of course, the choice of anti-rust oil also needs to consider the compatibility with the subsequent process. The BS-400 series is used before painting, and there is no residual oil film on the surface of the workpiece after cleaning, which will not cause shrinkage holes or adhesion loss in the coating. When used before welding, because the oil film is extremely thin and has good volatility, low smoke and low slag, it has little impact on the quality of the weld. In the electronics industry, salt spray test is required after the precision terminal is stretched. The anti-rust film provided by the BS-400 series can easily pass the neutral salt spray test for more than 72 hours, and will not form an insulating layer on the terminal contact surface, ensuring the reliability of the electrical connection. These advantages have made the BS-400 series widely recognized in many fields such as auto parts, hardware furniture, instrumentation, and new energy battery shells.
Another advantage that is easily overlooked is the economy of the Hank BS-400 series. Many engineers mistakenly believe that "easy to clean" equals "thin oil film and poor rust resistance". In fact, the BS-400 achieves high rust resistance at low viscosity by optimizing base oils and additives. This means less usage per unit area. Conventional thick oil film anti-rust oils may need to be applied more than 30 grams per square meter, while the BS-400 only needs 10 to 15 grams to achieve the same rust resistance grade. On an annual basis, although the unit price is slightly higher, the total cost is significantly reduced. Add in the savings in cleaning chemicals, heating energy, sewage treatment costs, and the overall comprehensive cost can usually be reduced by 15% to 20%. The effect of this "invisible money saving" is often fully realized in financial accounting.
Of course, no single product is a panacea. For long-term outdoor exposure or ultra-long-cycle rust protection for sea exports, Hanke also provides a higher grade of BS-500 series as a supplement. But for the vast majority of scenarios that are turned around in the workshop, short-term storage or rust protection between processes, the BS-400 series is sufficient. In addition, for different materials and processes, the BS-400 is divided into several viscosity grades. For example, BS-401 is suitable for precision sheet stamping, BS-403 is suitable for thick plate stretching and deep drawing, and BS-405 is suitable for electronic parts that require very low residue. Customers can choose the appropriate grade according to the actual working conditions, and if necessary, Hanke's technical engineers will also provide on-site proofing and process guidance to ensure accurate selection.
In order to help users better exert the product performance, here are some suggestions for use. First, the workpiece should be as dry as possible before oil is injected to avoid moisture entrainment, otherwise it will affect the integrity of the oil film. Second, dip coating, spraying or brushing can be used, but the oil tank needs to be filtered regularly to prevent metal chip contamination. Third, the temperature should not exceed 60 ° C during cleaning, otherwise the degreaser will be consumed too quickly and some surfactants will fail. Fourth, if chromium-free passivation or special conversion film treatment is required later, it is recommended to conduct a small batch process verification to determine the best matching cleaning parameters. These details may seem trivial, but they are the key to ensuring the quality of the project.
From the market feedback, more and more companies regard anti-rust oil as an important part of finishing, rather than just "applying some oil to prevent rust". They focus on cleaning efficiency, the impact of oil on the surface of molds and workpieces, environmental compliance, and more attention to comprehensive cost. The Hank BS-400 series captures these core needs, and gives satisfactory answers with precise formulations and stable quality. It is not just an anti-rust oil, but also a manifestation of a production management philosophy: making protection simple and subsequent processing more efficient.
In the increasingly competitive manufacturing industry, the improvement of every tiny process can lead to a significant competitive advantage. Choosing the Hank BS-400 series means that you no longer need to worry about degreasing after stamping and stretching, no longer need to worry about anti-rust oil destroying welding or coating quality, and no need to worry about environmental protection emissions. It makes the process of metal processing smoother, cleaner and more economical. In the future, with the continuous emergence of new materials and new processes, Hank will continue to optimize its product line to provide users in various industries with more professional and practical lubrication protection solutions. If you are looking for an anti-rust oil that can replace traditional oils and solve cleaning problems, you may wish to give the Hank BS-400 series a try. I believe that the data on site and the finish of the workpiece will provide the most powerful proof.
