Many users are not clear about the difference between hard film and soft film rust preventive oils that appear on the market. Soft film anti rust oil: refers to a layer of soft grease like oil film formed on the surface of metal workpieces after the solvent evaporates, which will not lose and can be cleaned with a solvent. Generally, it is mainly used for short-term, medium to long-term rust prevention indoors. Hard film anti rust oil: After the solvent evaporates, a transparent or opaque film without adhesion or impurities is formed on the surface, which looks like a transparent paint.
The following is a detailed introduction to hard film anti rust oil and soft film anti rust oil. The definition of film-forming state for soft and hard film anti rust oil is different, one is in a soft state and the other is in a firm state. Hard film anti rust oil can form a hard dry protective film with good adhesion on the surface of the workpiece, playing a long-term anti rust effect; Soft film anti rust oil forms a dry film after the solvent evaporates. This anti rust film can be easily removed by gasoline or kerosene, overcoming the difficulties of applying and removing anti rust grease. Characteristics of Hard Film Anti rust Oil 1. Reliable protection: The formed protective film will not crack or peel off, and has excellent resistance to damp heat and salt spray; 2. Widely used: suitable for long-term protection of various metals such as cast iron, steel, copper, aluminum, etc; 3. Convenient to use: No need for heating, can be dipped, sprayed, or brushed; 4. Safe and reliable: safe for human health and non corrosive to metals. Characteristics of Soft Film Anti rust Oil It has excellent rust prevention performance. When applied to metal surfaces, the solvent will quickly evaporate, forming an extremely thin diaphragm. It has a beautiful appearance, transparent color, and can see metal marks. And it has the advantages of no loss at high temperatures and no brittle cracking at low temperatures. Friendly to the environment and harmless to the human body. It is applicable to the short and medium term preservation and rust prevention of metal products (Ferrous and non-ferrous metals) indoors and outdoors, with a preservation period of 1-3 years. For rust prevention time, hard film rust prevention oil has a longer rust prevention time. In harsh environmental conditions, especially for outdoor workpieces, it can provide excellent rust prevention protection for metal surfaces; Soft film rust prevention oil has a shorter rust prevention time compared to hard film rust prevention oil, making it suitable for indoor rust prevention treatment. In addition, the hard film anti rust oil coating is aesthetically pleasing and suitable for workpieces with high precision requirements.
