In the field of precision hardware manufacturing and warehousing, rust has always been an "invisible killer" that threatens the quality and lifespan of products. Even the slightest trace of oxidation can lead to the failure of the precision mating surface, the deterioration of the surface roughness, and even the scrapping of the entire batch of parts. How to achieve long-term storage in harsh environments such as high humidity, temperature difference, and salt spray has become a serious issue facing many enterprises. Hank BS-400 series rust protection solutions, with excellent protection performance and perfect process adaptability, are gradually becoming the preferred solution in the field of precision hardware storage.
The difficulty of rust prevention for precision hardware lies first and foremost in the particularity of materials and structures. Materials such as bearing steel, die steel, and powder metallurgy parts are extremely sensitive to corrosive media, while complex geometric structures such as micro-threads, deep holes, blind holes, and slits are prone to moisture and dirt, making it difficult for traditional anti-rust oils to cover evenly. In addition, precision parts often require "ready-to-use", and the anti-rust film layer cannot affect the cleaning process before subsequent assembly or assembly, and even needs to have certain lubricating properties. The Hank BS-400 series was developed for these pain points.
The Hank BS-400 series uses a composite anti-rust additive system to form a dense and tough molecular adsorption film on the metal surface. The film can effectively isolate oxygen, water vapor and corrosive ions, especially showing excellent resistance to chloride and sulfide erosion. After salt spray test verification, under 5% NaCl, 35 ℃ environment, the test piece treated with BS-400 can withstand more than 96 hours without rust formation, far exceeding the level of ordinary anti-rust oil. This performance is essential for marine transportation or high-humidity storage of precision parts.
In addition to excellent anti-rust ability, the BS-400 series also places great emphasis on "ease of use" and "economy". Its low viscosity formula makes the oil film thin and uniform, and the surface of the workpiece is not easy to stick to dust, and subsequent cleaning is easier. At the same time, this series of products does not contain harmful substances such as barium salts and nitrites, and meets RoHS and REACH environmental protection requirements, making it safer for operators to contact. For different process needs, Hanke provides multi-seed models such as replacement type, solvent dilution type, and oily general-purpose type. For example, BS-401 is suitable for short-term rust prevention between processes, BS-402 is suitable for medium and long-term storage, and BS-403 has excellent salt spray resistance and is specially designed for export marine packaging.
In the actual storage process, the application of the Hank BS-400 series is very flexible. For the cleaned precision hardware, it can be directly applied by soaking, spraying or brushing. When soaking, it is recommended to completely immerse the workpiece in the anti-rust oil, keep it for 1-2 minutes, drain the excess oil after taking it out, and let it dry naturally. For parts with blind holes or complex internal cavities, vacuum dipping equipment can be used to ensure that the oil penetrates into every subtle corner. During spraying operations, the distance between the spray gun and the workpiece should be kept at about 20 cm, evenly covering the surface to form a film. No matter which method is used, it is necessary to ensure that the metal surface is sufficiently dry before applying, and there is no acidic or alkaline residue.
The value of the Hank BS-400 series anti-rust solution is not only reflected in the anti-rust performance, but also in the optimization of the comprehensive cost. The use of traditional anti-rust wax or thick anti-rust oil often requires cumbersome oil removal processes, while the thin oil film design of the BS-400 makes it possible to assemble parts directly after opening, or simply wipe them to enter the next process. This "non-inductive anti-rust" feature greatly reduces time and labor costs. At the same time, due to the more economical consumption per unit area, although the price of a single barrel is slightly higher, the comprehensive cost of use is actually lower. Many precision hardware companies report that after switching to BS-400, the customer complaint rate of products has dropped by nearly 70%, and the repurchase rate of regular customers has increased significantly.
Let's take a look at a practical case. A company specializing in the production of micro motor shaft cores in the south originally used ordinary anti-rust oil. After long-distance transportation in the rainy season, small rust spots frequently appeared on the surface of the shaft core, and customers returned it many times. Later, Hank BS-403 anti-rust oil was introduced, and the refined grinding shaft core was heated and soaked, and vacuum packaging was used with desiccant. Within a complete quarter, there was no rust complaint on the shipped products. The person in charge of the engineering department of the company said that BS-400 not only solved the problem of anti-rust, but also improved the uniformity and self-healing of its oil film during assembly, and even reduced the risk of fretting wear during assembly.
For precision hardware storage, the anti-rust solution cannot be the same. Another advantage of the Hank BS-400 series is the customizable service. The Hank technical team will recommend the most suitable model and process parameters based on the type of material, processing allowance, expected storage period, transportation environment and subsequent treatment methods of the customer. For example, for high-precision measuring tools that require long-term storage, it is recommended to use BS-402 with dual composite protection of gas-phase anti-rust bags. For stainless steel and carbon steel mixed parts, attention should be paid to avoid contact corrosion such as copper ions. The ester additives in the BS-400 series can effectively inhibit the occurrence of such galvanic corrosion.
Of course, any anti-rust scheme is inseparable from the correct operating specifications. When using the Hank BS-400 series, the working environment should be kept clean and ventilated to avoid open flames. Workpieces that have not fully formed a film after coating should be placed horizontally to prevent liquid accumulation in the lower layer. For workpieces that have rusted, they must be rust removed, cleaned, and dried before anti-rust treatment, otherwise the anti-rust film cannot be firmly adsorbed. In addition, the anti-rust oil after opening should be sealed and stored to prevent moisture or impurities from being mixed in. Regularly check the moisture content in the bath or oil pool. If there are layers or flocculents at the bottom, it is necessary to filter or replace the new oil in time.
To sum up, from protection performance, easy operation, environmental friendliness to cost-effectiveness, the Hank BS-400 series rust protection solution shows comprehensive advantages. It can not only effectively cope with harsh storage conditions such as humidity, salt spray, temperature difference, etc., but also simplify the process, improve efficiency, and create a solid quality moat for precision hardware enterprises. In today's pursuit of lean manufacturing, choosing the Hank BS-400 is to give each precision part a safe and reliable "dormant chamber", so that the beauty of metal can withstand the test of time and environment, and still shine as new. In the future, Hank will continue to develop higher-performance rust-proof materials, make progress together with the precision manufacturing industry, and work together to protect every inch of Seiko details.
