Polystyrene and cornstarch anti-corrosive coatings on steel

Abstract

This work aims to evaluate the performance of anticorrosive thermoplastic coatings in cold rolled steel sheets. Two types of thermoplastic coatings were studied: polystyrene (PS) and cornstarch. These types of coatings are applied for protection against corrosion during transport and storage of steel plates after cold rolling until delivery to stamping or other processing. The good performance for these coatings is suitably standardized to ABNT NBR 5915-2: 2013 and ASTM A1008 / A1008M-2016. According to corrosion tests carried out in saline chamber, the coatings were satisfactory in different degrees of guarantee of corrosion protection on ASTM 1080 steel, in accordance with standards mentioned.

Uniform, Anticorrosive, and Antiabrasive Coatings on Metallic Surfaces for Cation–Metal and Cation−π Interactions

“…We employed aqueous suspensions of PS microspheres with 0.5 μm diameter in the experiments because these PS particles are not only widely used to research the physics of the coffee-ring effect, 23,25,27 but can also be used as anticorrosive coatings. 19 Some of these aqueous suspensions were thoroughly mixed with solutions of the Zn 3 (PO 4 ) 2 and EDA molecules to obtain mixtures of differently complexed Zn 2+ concentrations, where the EDA molecules complexed with Zn 2+ to make the Zn 3 (PO 4 ) 2 dissolve in water. Drops of these mixtures and the aqueous suspensions without complex Zn 3 (PO 4 ) 2 were then separately dropped on the iron surface (Figure 1a).…”

“…Metallic materials are not only the oldest artificial materials that play pivotal roles in civilization and industrialization processes, but also are the most important and prevalent materials in present from our daily life to industrial production, including automobiles, ships, aircraft, petrochemical equipment, household electrical appliances, and furniture. − In these relative applications, the corrosion and abrasion of metallic materials are the most headache issues and large hindering, and will cause huge economic losses, environmental pollution, and safety consequences. − Coatings on these metallic surfaces not only beautify the materials, but also act as a key factor in the reduction of corrosion and abrasion. − …”

“…There have been great efforts to protect the metals with various coatings, including organic polymers , and two-dimensional nanomaterials (e.g., graphene ,, or boron nitride), amino acids, and self-healing smart coatings . However, the ubiquitous nature of the coffee-ring effect − makes these processes difficult, resulting in the nonuniform distribution of coatings.…”

“…5−10 Coatings on these metallic surfaces not only beautify the materials, but also act as a key factor in the reduction of corrosion and abrasion. 11−22 There have been great efforts to protect the metals with various coatings, including organic polymers 18,19 and twodimensional nanomaterials (e.g., graphene 11,14,15 or boron nitride 13 ), amino acids, 17 and self-healing smart coatings. 16 However, the ubiquitous nature of the coffee-ring effect 23−35 makes these processes difficult, resulting in the nonuniform distribution of coatings.…”

Anti-corrosive Polystyrene Coatings Modified with Tannic Acid on Zinc and Steel Substrates

“…The most common use of polystyrene is in the production of plastics [6], and since it exhibits interesting thermic characteristics, it is the precursor of Styrofoam, a material widely used in various industries. In the corrosion protection domain, PS has mainly been used in the form of copolymers with different acids [7] or the form of a copolymer with cornstarch [8] for the corrosion protection of steel substrates. PS microcapsules containing silanol and Ce (III) inhibitors in epoxy coatings have also been reported as corrosion barrier systems [9].…”