Corrosion resistance of titanium plates
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Dear experts, I’m using a titanium plate to make the lid of a reactor. The user is applying acrylic, styrene, and water at a temperature of 75 degrees Celsius, and he reports that blackening occurs. Could these materials cause corrosion or react with titanium? Thank you!
Acrylic acid is a possibility; what about temperature and concentration?~~~~~~~~~~~
It is an experimental reactor with a capacity of 100 L; 50 L of water is used, and the amount of acrylic acid added is 0.4% of that volume. The heating temperature is 75 degrees℃
1. It is flammable; its vapors can form explosive mixtures with air, and combustion and explosion can occur in the presence of open flames or high heat. It can react violently with oxidizers. In the event of high temperatures, a polymerization reaction can occur, releasing large amounts of heat that may cause the container to rupture and lead to an explosion. It tends to self-polymerize upon exposure to heat, light, moisture, peroxides, and iron, leading to an explosion. 2. It possesses combined reactions of double bond and carboxyl functional groups, and can undergo addition reactions, functional group reactions, and transesterification reactions; it is used to prepare polycyclic and heterocyclic compounds, can be reduced by hydrogen to propionic acid, and decomposes into formic acid and acetic acid in the presence of alkali. 3. It has a high acidity. It is corrosive. It has reactive chemical properties. It easily polymerizes to form a transparent white powder. Propionic acid is produced during reduction. Addition to hydrochloric acid yields 2-chloropropionic acid. Acrylic acid can undergo the characteristic reactions of carboxylic acids; it can also react with alcohols to yield corresponding esters. Acrylic acid and its esters, either on their own or when mixed with other monomers, undergo polymerization to form homopolymers or copolymers. Monomers that can typically be copolymerized with acrylic acid include amides, acrylonitrile, vinyl-containing compounds, styrene, and butadiene, among others. Such polymers can be used to produce various plastics, coatings, adhesives, elastomers, floor polishers, and paints. 4. This product is highly corrosive and has moderate toxicity. Its aqueous solution or high-concentration vapor can irritate the skin and mucous membranes. The oral LD50 in rats is 590 mg/kg. Be careful not to come into contact with acrylic solutions or vapor; wear appropriate work clothes and a work hat, protective glasses, and rubber gloves when handling it. Production equipment should be enclosed. Work and storage areas should have good ventilation.
No information was found regarding the corrosive effect of acrylic acid (C2H3COOH) on Ti. However, propionic acid (C2H5COOH) has a very strong corrosive effect on Ti~~~~~~~ For reference only~