Análise de simulantes para produtos ácidos acondicionados em embalagens metálicas / Analysis of simulants to acidic products conditioned in meal package

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

30/07/2012

RESUMO

Tin-plate cans represent most of the cans for canned food. Since they are not inert, during the storage period, interaction occurs with the product and metal dissolution can occur, especially when it is acid food. To minimize this interaction it is used organic coatings, and epoxy-phenolic resin is the the most used. As the foods are complex biochemical systems, in most of the studies related to the interaction product / package simulants are used, that are organic substances that are analogous to the diffusive properties of food and have simpler composition. These substances are used in the tests to replace the food, to facilitate, speed up and reduce costs in analytical procedures. The choice of simulating is made according to the physico-chemical properties of the food, which follows the classification determined by the legislation. For acidic aqueous food the proposed simulant is acetic acid 3% (w / v). This work aimed to evaluate alternative solutions to acetic acid simulating, analyzing the performance in cans with nominal layer of tin 2.0 g/m2 coated with lacquer-type epoxy phenolic (double inner layer) when in contact with these solutions . The technique of electrochemical impedance spectroscopy was used to monitor the degradation of organic coating and to characterize their barrier properties over time as corrosion resistance; polarization was applied to determine the corrosion rate and susceptibility to corrosion of metallic material. Also images were also obtained of the sample surfaces by Scanning Electron Microscopy and Energy Dispersive Spectroscopy (SEM / EDS) after the electrochemical tests to complement the characterization of the film.

ASSUNTO(S)

alimentos - embalagens folha-de-flandres - indústria revestimento de metal corrosão food tinplate metal coating corrosion

ACESSO AO ARTIGO

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