In the field of industrial manufacturing and metal processing, anti-rust oil is a crucial protective barrier, directly related to the storage life of the workpiece and the quality of the finished product. However, many anti-rust oil products on the market have vague parameters and exaggerated performance, making it difficult for purchasers and technical engineers to make accurate judgments. Today, with a professional, transparent and rigorous attitude, we have fully disclosed the core technical parameters of Hank BS-400 series anti-rust oil, using real data to speak, so that the quality can be seen, verified and trusted.
Product positioning of Hank BS-400 series anti-rust oil
Hank BS-400 series anti-rust oil is a high-performance oil-based anti-rust agent specially designed for the medium and long-term anti-rust needs of ferrous metals and some non-ferrous metals. The series uses refined mineral oil as the base oil, compounded with a variety of high-efficiency anti-rust additives, anti-oxidants and film-forming agents, which can form a dense and stable protective film on the metal surface, effectively isolating moisture, oxygen and corrosive media, thereby significantly delaying the occurrence of rust. Its application scenarios cover many industries such as automotive parts, machining, hardware tools, steel pipes, bearings and gears.
Unlike ordinary anti-rust oils, the BS-400 series not only meets excellent anti-rust performance, but also takes into account the subsequent cleaning and coating compatibility of the workpiece, achieving a good balance between rust prevention in the process and rust prevention in the finished product. More importantly, Hank insists on making every technical parameter public, abandoning "concept marketing" and allowing users to evaluate product suitability based on objective data.
II. Full disclosure of core technical parameters
In order to help users gain a comprehensive understanding of the BS-400 series anti-rust oil, we have listed its main technical parameters as follows (based on the typical product BS-401, other models are slightly different):
1. Appearance and physical and chemical indicators
Appearance: Amber transparent liquid with no visible mechanical impurities.
Kinematic viscosity (40 ° C, mm ²/s): 15.0~ 25.0. This viscosity range ensures that the oil has good permeability and a certain oil film thickness, which can penetrate into the microscopic gaps of the workpiece and is not easy to lose excess on the vertical surface.
Density (20 ℃, g/cm ³): 0.85~ 0.92. Moderate density makes it easy to spray, brush or soak.
Flash point (opening, ° C): ≥160. High flash point means safer storage and usage performance, reduced fire risk, and greater transport compliance.
Freezing point (℃): 11728413 2001-15. Even in a cold environment, the oil can still maintain fluidity and is suitable for use in winter workshops in the north.
Moisture: none. No free water or emulsified water at all to avoid damage to the anti-rust effect by moisture.
2. Core parameters of anti-rust performance
Salt spray test (35 ℃, 5% NaCl, h): tested by GB/T 10125 method, 45 #steel sheet, film thickness of about 5 μm, continuous salt spray test time of ≥72 hours, no rust on the surface. This data means that in the harsh salt spray environment, BS-400 can provide effective protection for more than three days, corresponding to the actual storage environment usually up to 6 to 12 months (depending on packaging conditions).
Humid heat test (49 ℃, relative humidity ≥95%, h): According to GB/T 2361 method, No. 40 steel sheet has been tested for ≥240 hours without corrosion. Humid heat environment is the most common corrosion condition in the rainy season in southern China, and BS-400 exhibits strong moisture resistance.
Lamination test (50 ℃, relative humidity ≥95%, h): ≥168 hours without rust. In the lamination contact state, ordinary anti-rust oil is prone to rust due to local hypoxia and liquid accumulation, and the additive system of BS-400 can effectively deal with this edge situation.
Corrosion test (steel sheet, copper sheet, h): The steel sheet and copper sheet are tested at 100 ° C for 4 hours without discoloration or corrosion. It proves that the oil has good compatibility with various metal materials and does not cause blackening or corrosion of copper parts.
3. Oil film characteristic parameters
Film thickness (μm): After drying, the film thickness is 2 to 8 μm, depending on the coating process and dilution ratio. The film thickness is moderate, and it will not fail due to too thin, nor will it affect the workpiece assembly or subsequent processes due to too thick.
Finger drying time (25 ° C, 50% relative humidity): The surface finger dries for about 20 to 30 minutes after spraying or dipping, and it takes 24 hours to fully cure. Short schedule drying is conducive to rapid circulation and reduces workshop space.
Cleaning removability: It can be cleaned and removed with ordinary metal cleaning agent or degreaser at 70 ° C, and the residual oil rate is ≤0.5%. It provides convenience for subsequent electroplating, blackening, painting and other processes.
4. Use process parameters
Concentration: Use the stock solution, or use kerosene or special diluent to adjust the viscosity. It is recommended to use the stock solution to ensure the best anti-rust effect.
Applicable temperature: can be applied at room temperature to 80 ° C, with better permeability during hot coating.
Consumption: When spraying or dipping, each kilogram of oil can handle an area of about 30 to 50 square meters, depending on the surface roughness and film thickness requirements of the workpiece.
5. Environmental protection and safety data
Environmental protection characteristics: no chromate, nitrite, phosphate and other harmful substances, in line with RoHS and REACH regulations, waste liquid is easy to handle.
VOC content: low volatile organic compound formula, mild odor, improve the working environment.
Biodegradability: Base oils are biodegradable and have little impact on the environment after long-term use.
III. The quality logic behind the technical parameters
The reason why Hank BS-400 series is willing to disclose the above parameters is due to confidence in product performance and a responsible attitude towards users. Each parameter does not exist in isolation, but constitutes a complete performance system.
Taking the relationship between viscosity and film thickness as an example, a viscosity of 15~ 25mm ²/s can ensure the continuity of the oil film without causing a decrease in fluidity and permeability. In actual use, if the customer pursues a thinner oil film to facilitate assembly, the BS-402 low viscosity model can be selected; if the surface of the workpiece is rough or stored outdoors for a long time, the BS-403 high film thickness model provides a stronger physical isolation effect. It is this adjustable parameter and transparent data design that allows the BS-400 series to cover a variety of rust protection needs from precision parts to large structural parts.
The data from the salt spray test and the damp heat test are the "gold standard" for judging the true level of anti-rust oil. The BS-400 can last for more than 72 hours in 5% neutral salt spray, which means that under normal indoor storage conditions, even without additional sealing packaging, it can last for several months without rust. If used with a VCI anti-rust bag, the protection period can be further extended to 18 months.
Lamination test is an easily overlooked but extremely important indicator. Many workpieces are stacked or placed close to each other when stored, and the oil film at the interface is easy to be squeezed out, and it is difficult to come into contact with fresh air, forming a micro-battery corrosion environment. BS-400's unique anti-rust additive can form a chemisorption film on the metal interface, even if the oil film is very thin, it can effectively prevent the occurrence of electrochemical corrosion. This advantage is particularly evident in dense stacking scenarios such as gears, gaskets, and stamped parts.
IV. Quality verification and application of the Hank BS-400 series
Technical parameters are the theoretical basis, and practical application is the final touchstone. The Hank BS-400 series is used in more than 500 manufacturing companies around the world, covering automotive parts, hardware tools, construction machinery, railway equipment and other fields.
In an auto parts factory in Jiangsu, a batch of 45 #steel brake discs were soaked in BS-401 and stored on the turnover rack for 4 months. During this period, they experienced many day and night temperature differences and humidity fluctuations without any rust marks. However, after using a certain brand of anti-rust oil, yellow rust appeared in two months. The technical department sent the two oils to a third-party testing agency for salt spray comparison test. The results showed that the surface of BS-401 was still bright after 72 hours of salt spray test, while the comparison oil appeared rust points within 48 hours.
In a tool manufacturing company in Zhejiang, because the export of products needs to be shipped by sea, the workpiece needs to be subjected to high salt spray and high humidity environment in the container for about 30 days. After using the BS-400 series anti-rust oil and the gas phase anti-rust bag, all the wrenches and pliers are intact, and the customer acceptance pass rate is close to 100%. The person in charge of procurement of the company said that it is because of the full disclosure of the technical parameters of Hank BS-400 that they dare to adopt, because "the transparency of the parameters means that the quality is controllable, and the problem can be traced back."
In a steel pipe processing enterprise in Hebei, the inner and outer walls of seamless steel pipes with a diameter of 219mm are sprayed with BS-403. After three months of outdoor storage, the surface of the steel pipe is still smooth and rust-free. The technical director of the enterprise commented: "The film formation speed of BS-400 is very fast, the film layer is not sticky, and it will not turn white after rain. It can indeed be seen that it is the quality of international brands."
V. Precautions and Suggestions for Use
Although the BS-400 series has excellent performance, it can only be fully utilized when used correctly.
1. Surface pretreatment: Iron filings, oil stains, sweat, dust, etc. on the surface of the workpiece must be cleaned before oiling. It is recommended to use an alkaline degreaser for cleaning and drying, or use a water-based cleaning agent with ultrasonic cleaning. Residual acidic substances or chloride ions will greatly weaken the anti-rust effect.
2. Painting method: small pieces can be dipped, large pieces can be sprayed or brushed. It is recommended to use airless spraying or air-assisted spraying when spraying, pay attention to keep the spray distance uniform, and avoid local accumulation or leakage. For workpieces with deep holes or blind holes, it is recommended to use vacuum dipping or rotary dipping to ensure that the oil film is covered in place.
3. Film thickness control: The anti-rust effect is closely related to the film thickness. For short-term indoor protection, 2 to 3 μm is enough; for long-term outdoor storage, a film thickness of 5 to 8 μm is recommended. Users can monitor the film thickness at any time according to consumption or thickness gauge.
4. Storage environment: Oiled workpieces should be placed in a dry and ventilated warehouse to avoid direct sunlight and acid mist environments. Keep a certain distance from the ground to prevent ground moisture erosion. If you need to stack for a long time, you can place anti-rust paper between layers or use gas phase anti-rust materials to assist.
5. Oil maintenance: After long-term use of the anti-rust oil in the soaking tank, the bottom sediment should be cleaned regularly, and the viscosity, flash point, moisture and other indicators of the oil should be tested. It is recommended to conduct a comprehensive inspection every six months, replenish new oil or replace the whole tank in time to ensure stable anti-rust performance.
Sixth, the comparative advantages of Hank BS-400 series with other common anti-rust products
Compared with anti-rust grease, BS-400 oil film is thin and uniform, does not need to be heated and painted, the workpiece is not easy to stick to ash, and subsequent cleaning is easier. Compared with water-based anti-rust agent, BS-400 has better anti-salt spray ability and longer anti-rust period, and does not need to worry about water stains on the surface of the workpiece. Compared with cheap anti-rust oil, BS-400 has sufficient additive content, long salt spray time, and does not have problems such as oil film stickiness and mildew in high temperature and high humidity environment.
In terms of cost-effectiveness, although the price of a single liter of BS-400 is slightly higher than that of ordinary anti-rust oil, the comprehensive use cost is actually lower due to the thin film, low consumption, long anti-rust period, and low rework rate. Taking the production of metal fasteners as an example, the annual oil consumption is 10 tons, and the use of ordinary oil requires frequent rework and increased packaging costs. After switching to BS-400, although the procurement cost increases by 8%, the overall protection cost and scrap rate decrease by more than 20%.
Seven, quality is visible, trust is based
The core value of Hank BS-400 series anti-rust oil is not only a series of beautiful technical parameters, but also that these parameters have been tested by long-term actual working conditions. We insist on making the inspection data of each process public, so that users can rely on every step from selection to acceptance.
Hanke has established a strict quality traceability system. Each batch of BS-400 products will be kept for at least three years and a complete test report will be provided. If users have any questions in the application, we not only provide technical guidance, but also are willing to jointly investigate the cause to ensure that the product value is truly realized.
The disclosure of technical parameters is Hanke's confidence in the quality of its products and a driving force for transparency in the industry. We believe that only by allowing users to see, touch, and measure can true brand trust be established.
If you are looking for a reliable, stable and verifiable industrial anti-rust oil, choose the Hank BS-400 series. Every metal workpiece is properly protected, so that every quality promise can stand the test of time.
Hank BS-400, using data to demonstrate strength and protecting the industry with quality.
