In precision machining, mold manufacturing, automobile maintenance, and even daily hardware operations, measuring tools are like the "eyes" and "hands" of craftsmen. Precision measuring tools such as vernier calipers, micrometers, dial meters, plug gauges, and thread gauges, once rusted, rust spots on the surface will affect the reading clarity, and heavy will lead to the loss of accuracy of the measuring surface, and even the entire measuring tool will be scrapped. Rusty wrenches, pliers, knives and other tools not only affect the operation feel, but also reduce work efficiency and bring safety hazards. Therefore, rust prevention maintenance is by no means an optional "trivial matter", but a key link related to product quality, production cost and operation safety.
Among many anti-rust products, Hank BS-407 thin layer anti-rust oil has gradually become the preferred solution for machining workshops, measuring tool administrators and maintenance technicians due to its excellent comprehensive performance. Where is it "reliable"? And how can it be used correctly to keep measuring tools in the best condition for a long time? This article will start from the root cause of measuring tool rust, analyze the advantages of Hank BS-407 thin layer anti-rust oil in depth, and give systematic anti-rust maintenance suggestions.
Why do measuring tools rust?
The essence of metal rust is the electrochemical corrosion of iron or steel with oxygen and moisture in the air. In the actual environment, the factors that cause rust are far more complicated than imagined:
1. Hand sweat and salt: When holding the measuring tool by hand, the salt, lactic acid and urea in the sweat will destroy the oxide film on the metal surface, form an electrolyte film, and accelerate corrosion. Even if it is only briefly touched, it will leave "fingerprint rust".
2. Cutting fluid residue: In the machining workshop, the measuring tool is often exposed to cutting fluid or coolant containing active elements such as sulfur and chlorine. Once these chemicals remain on the surface of the measuring tool, even if dried, they are easy to absorb moisture in subsequent storage and induce pitting corrosion.
3. Air humidity and temperature difference: In a precision measuring tool warehouse or tool cabinet, the temperature difference between day and night can cause condensation. When the relative humidity exceeds 60%, a water film invisible to the naked eye can easily form on the steel surface, causing uniform rust.
4. Dust and acid-base gases: Dust particles floating in the air may carry corrosive ions, while acidic gases such as sulfur dioxide and hydrogen sulfide in industrial environments can also react directly with metals to form corrosion products.
5. Improper packaging and storage: Placing directly on a wooden table top, or in long-term contact with acidic wood or rubber pads, will damage the anti-rust layer. In addition, newly ground measuring tools have high surface activity and are very prone to rust if not promptly treated with anti-rust treatment.
To understand these causes of rust, we can understand that a reliable anti-rust oil must not only be able to isolate moisture and air, but also have permeability, displacement, film formation and certain neutralization capabilities. Hank BS-407 thin layer anti-rust oil is designed for these needs.
Second, the core advantages of Hank BS-407 thin layer anti-rust oil
Hank BS-407 is a thin-layer anti-rust oil prepared with refined mineral oil as base oil and adding a variety of high-efficiency anti-rust additives, film-forming agents and penetrant agents. It is specially developed for short-term rust prevention and long-term storage of metal products such as precision measuring tools, knives, bearings, and tooling fixtures. Its reliability is reflected in the following dimensions:
1. Excellent penetration and replacement capabilities
The surface of the measuring tool often has tiny pits, threaded grooves and mating gaps, which are difficult for ordinary anti-rust oils to penetrate deeply. However, Hank BS-407 has extremely low surface tension and excellent permeability, which can quickly penetrate along the capillary gaps of the metal surface, "squeeze out" the existing water film or micro-electrolyte, and form a continuous and dense protective film on the metal surface. This feature is particularly important for assembled calipers, micrometers, and especially complex structures such as inner diameter meters. Without complete disassembly, the oil can reach the internal moving parts.
2. Light and thin oil film, the accuracy is not "thickened"
Measuring tools are extremely sensitive to size, especially physical reference measuring tools such as plug gauges, ring gauges, and measuring blocks. If the anti-rust oil film is too thick, it will directly affect the assembly and measurement results. Hank BS-407 adopts a "thin layer" design, and the thickness of the oil film is only about 2-5 microns, which is equivalent to one-tenth of the human hair. It can not only ensure the anti-rust performance, but also will not change the size matching relationship of the measuring tool. At the same time, its oil film is clear and transparent, and it will not leave a sticky residue on the scale or measuring surface of the measuring tool. It is very convenient to wipe. It can be exposed with a clean cotton cloth.
3. Long-term stability, salt spray resistance and moisture resistance
After the neutral salt spray test, the anti-rust period of Hank BS-407 in the standard environment can reach several months or even longer (the actual anti-rust time depends on the environmental conditions and oil film integrity). The sulfonate anti-rust agent in its formula can form physical adsorption and chemical adsorption on the metal surface, effectively neutralize acidic substances in hand sweat, and have excellent shielding effect on water vapor in humid air. In the rainy season in the south or in the high salt spray environment along the coast, Hank BS-407 can still play a stable protective role.
4. Easy to use, environmentally friendly and low odor
Traditional anti-rust oils often have a pungent smell, or the oil film is sticky and easy to absorb dust. Hank BS-407 adopts a low-odor formula with moderate volatilization rate. After coating, a semi-dry to dry thin layer is formed within a few minutes, which does not stick to hands and does not absorb ash. The operator can soak, brush or spray, and it feels refreshing after use. At the same time, its environmentally friendly additives do not contain nitrite and heavy metals, comply with the RoHS directive requirements, and are more friendly to the operator and the environment.
5. Excellent compatibility with workpieces
Hank BS-407 is not only effective for steel, but also has good adaptability to common measuring tool materials such as copper, aluminum alloy, and coating surface. More importantly, its oil film will not react with subsequent cleaning solvents (such as gasoline, kerosene, and alcohol) that are difficult to remove, making it easy to remove the measuring tool during regular verification or use. Even if a small amount remains on the measuring surface, it will not affect the normal use and calibration accuracy of the measuring tool.
Third, the correct steps for anti-rust maintenance of measuring tools
With reliable anti-rust oil, you must also master the correct maintenance methods. The following is a set of standardized operation procedures from cleaning to storage, suitable for vernier calipers, micrometers, dials, angle scales, block gauges and various hand tools:
Step 1 Clean and decontaminate
First use a soft brush or cotton swab to remove metal debris, dust and oil stains on the surface of the measuring tool. For precision parts such as measuring surfaces and rods, use a non-woven fabric dipped in a cleaning agent (kerosene or special measuring tool cleaning agent is recommended) to gently wipe, and do not use sandpaper or a hard scraper to avoid scratching the reference surface. If the measuring tool has come into contact with the cutting fluid, it can be cleaned with warm water and neutral detergent, and then immediately blow-dried with dry compressed air or hot air.
2. Dry and dehumidify
Put the cleaned gauge in a drying oven at around 65 ° C to dry for 30 minutes, or place it in a ventilated place to fully dry. This step is particularly important - if the residual moisture in the gap of the gauge is not completely removed, the anti-rust oil will not be able to fully replace it. After drying, wipe the surface again with a clean cotton yarn or a lint-free cloth to ensure that there are no water marks.
3. Coating Hank BS-407 thin layer anti-rust oil
Dip coating or brush coating are recommended.
- Dip Coating Method: Fully immerse the measuring tool in the container containing the Hank BS-407 and soak for about 1-2 minutes to allow the oil to fully penetrate all minor gaps. After removing, hang or place on the drain rack to allow excess oil droplets to flow naturally, paying attention to the impermeable plate underneath.
- Brush/spray method: Use a soft brush or spray gun to evenly apply the anti-rust oil to the surface of the measuring tool and the moving mechanism. For the ruler frame of the caliper and the differential cylinder shaft of the micrometer, you can apply more and move it back and forth several times to ensure that the oil penetrates the friction surface. When spraying, it is recommended to keep a distance, a thin layer is enough to avoid local oil accumulation.
4. Let stand for film formation
The oiled measuring tool should be placed in a dry and dust-free environment for at least 15-20 minutes to allow the anti-rust oil to fully level and form a uniform protective film. Avoid touching during this period, and do not pack immediately. After the oil film is completely stable, proceed to the next process.
5. Packaging and storage
The measuring tools for sealing and anti-rust should be covered with anti-rust paper or polyethylene film and placed in a special tool box or measuring cabinet. If long-term storage is required, a desiccant (silica gel) can be added to the package to further reduce the relative humidity. The storage environment should keep the temperature 5-40 ° C, the relative humidity below 70%, and keep away from acid and alkali gases.
6. Regular inspection and recoating
Even if high-quality anti-rust oil is used, it should be sampled every 1-3 months. Open the package to check the condition of the oil film. If the oil film is found to be thinner, discolored or spotty rust spots, it should be immediately re-cleaned and reapplied Hank BS-407. For frequently used measuring tools, it is recommended to wipe them with an oily rag before get off work every day, which can not only clean hand sweat but also replenish the oil film.
IV. Common rust prevention misunderstandings and the response to Hank BS-407
Myth 1: The more anti-rust oil is applied, the more secure it is.
Wrong. Too thick oil film is not only wasteful, but also absorbs dust and abrasive particles. When the measuring tool moving mechanism is running, these impurities will exacerbate wear and tear. Hank BS-407 thin layer design is precisely to avoid this problem. A small amount of uniform application can obtain the ideal anti-rust effect.
Misunderstanding 2: Machine tool rail oil and oil can also be used as anti-rust oil?
The oil and hydraulic oil are mainly lubricated, and the content of anti-rust additives is low, which cannot effectively resist hand sweat and salt spray. Moreover, the viscosity is high, and it is easy to form a viscous oxide film on the surface of the measuring tool, which affects the accuracy. Hank BS-407 is specially formulated for the needs of anti-rust, and the anti-rust performance is far from comparable to that of general-purpose lubricants.
Misunderstanding 3: After rust prevention, no longer clean the measuring tool and use it directly?
Does the anti-rust oil film have to be removed before the measurement? It depends on the requirements of the use of the measuring tool. For tooling fixtures with lower precision grades, the thin oil film can be retained without affecting the function; but for precision measuring tools, the oil film on the measuring surface should be wiped off with clean cotton yarn before use to ensure reliable contact between the measuring surface and the workpiece. Hank BS-407 oil film is extremely easy to erase, leaving little residue and will not leave stains on the workpiece.
Misunderstanding 4: Only rust-proof without lubrication?
The moving parts of the measuring tool (such as caliper frame, micrometer measuring screw) need to be properly lubricated in addition to rust prevention. Hank BS-407 has excellent rust prevention and a certain degree of lubricity. It can form a buffer oil film on the metal friction surface, making the movement smooth and handy. Compared with using anti-rust oil and grease step by step, one step is in place to simplify the maintenance process.
Application suggestions in different scenarios
1. Precision metering room
High-precision standard appliances such as measuring blocks, ring gauges, and plug gauges are recommended to use the "dip coating + drying" method and store in a constant temperature and humidity cabinet. The low volatility of Hank BS-407 ensures that long-term storage will not dry up, and maintenance-free during the verification cycle.
2. Machining workshop
Production site measuring tools are used frequently and are easy to come into contact with cutting fluid and metal chips. It is recommended to spray Hank BS-407 to the surface and moving parts of the measuring tool after cleaning at the end of each shift. Fast-paced recoating does not affect the production beat. For tools (such as reamers, taps), the anti-rust layer can also play a certain role in cutting and reducing friction.
3. Mold and equipment maintenance
Large molds, machine tool guides, fixture base surfaces and other parts that do not participate in accurate measurement can be fully and thinly coated by brushing. The good spread of Hank BS-407 makes the large plane oil film uniform, saves oil and reduces comprehensive costs.
4. Home and outdoor tools
Household tools such as wrenches, pliers, screwdrivers, hand drills, etc., are directly dipped or sprayed with Hank BS-407 after cleaning and drying, which can effectively resist the erosion of kitchen fumes, bathroom moisture and outdoor rain, and prolong the life of tools.
Technical indicators and quality control of Hank BS-407
As a trusted brand in the field of industrial anti-rust oils, Hank implements strict quality control on BS-407. Typical technical parameters include: the appearance is light yellow transparent liquid, the density (20 ° C) is about 0.82-0 g/cm ³, the kinematic viscosity (40 ° C) is between 3-8 mm ²/s, the flash point is not less than 120 ° C, and the drying time (referring to the dry touch method) is less than 20 minutes. The product has undergone salt spray test, damp heat test, corrosion test and other performance verifications before leaving the factory to ensure that the anti-rust performance of each batch is stable and reliable.
In addition, the packaging specifications of the Hank BS-407 are flexible, with a variety of options such as 500mL spray cans and 1L/5L/20L barrels, which are suitable for individual users and can meet the centralized oil supply needs of the workshop. The remaining oil after use should be sealed and protected from light, and the shelf life is usually five years.
Conclusion: Reliable anti-rust, starting with the right oil
The anti-rust maintenance of measuring tools seems simple, but in fact it contains a deep understanding of the mechanism of metal corrosion and the ultimate pursuit of product craftsmanship. Hank BS-407 thin layer anti-rust oil provides just the right protection for precision measuring tools with excellent penetration replacement ability, light and non-scaling oil film, long-term moisture and salt spray resistance, and environmentally friendly and safe formula, making daily maintenance easy and efficient.
Whether it is the vernier caliper used by the factory quality inspector day and night, or the old man who has accompanied the old master's toolbox for many years, a thin layer of Hank BS-407 is enough to keep them as clean as new and accurate as the years go by. Choosing a reliable anti-rust oil is to choose a reliable production guarantee. Remember: the measuring tool does not rust, the measurement is accurate; the tool is often maintained, and the work is more secure. Let Hank BS-407 be your loyal partner on the workbench, prove with time and quality - the real anti-rust champion is by your side.
