1. Which is the optimum adhesive to fix stainless steel with another stainless steel (plates)?

To glue plates of inox, it can be used double ribbon face of 3M (white, not transparent), in the case of small surfaces.
If the surfaces to glue will be bigger, can use formic glue, having the care to cover the two surfaces to be glue waiting to dry before proceeding with the glue.


2. What can I do to prevent corrosion in a tank made of stainless steel 304, which works with chlorine solution?

When the people speak of “chlorine solution” can be speaking of different things. Of all form, either one or another interpretation that demons to this chlorine solution, the risk of corrosion in the stainless ones will be always present.

The chlorine is a gas. We can bubble the gas chlorine in water and have a chlorine solution (in the reality it becomes fluid itself very little in the water). Up to 3 ppm of free chlorine in the water, is resisted by the 304. Between 3 and 5 ppm, who resists is the 316. More than what this, nor the 316. The people also speak of “chlorinated water” when they mention to the bleach (Candida type, for former.) and these chlorinated waters are in reality solutions of hypochloric of sodium. As much the free chlorine (gas) in the water how much the hypochloric of sodium can provoke corrosion for pites in stainless steel. Who knows, for this tank, the steel carbon coated with some plastic, as PVC or polypropylene, more would be adjusted.


3. Which is the mechanism that makes the austenitic stainless steel becomes magnetic when worked in the cold? Does exist a table, or way of association to foresee the level of magnetic permeability with the deformation level?

In a generalized manner, what it determines the magnetic character of a stainless steel and the balancing of chemical elements in its composition, therefore through it we will be able to have an austenitic or ferritic structure.

The ferritic stainless steel are magnetic and austenitic the not magnetic ones. However the austenitic steel when conformed, can come to have part of the austenitic of its structure transformed into Martensitic, what it will confer a magnetic character to the material. The magnetic permeability is proportional to the intensity of the deformation, however does not exist no table that allows foreseeing the level of permeability in function of the deformation. How much bigger the Nickel text in the material, minor the magnetism after the deformation, this because the Nickel has stabilizing effect of the austenite hindering its transformation in Martensitic.

To eliminate the magnetism, a thermal treatment of annealing can be made 1100 -1150 ° C that will go to transform the Martensitic into austenite.


4. Which is the influence of the rugosity in the resistance to the corrosion of the stainless steel?
   
A smooth surface, less rugged, has little probability to hold back contaminants dust, dirt, particles or any another external product that can affect the stainless steel. Moreover, a smooth surface facilitates the cleanness process. Therefore the more smooth it will be the surface, greater will be the protection against the corrosion provoked for external contamination. For other types of corrosion, as the intergranular one, the corrosion under tension, acid attack of etc., the rugosidade of the surface is a secondary factor. In these cases most important it is to specify the type of adjusted stainless steel for each application.


5. What’s the current address for correspondence?

RIO DE JANEIRO
Elinox Comercial e Distribuidora de Aço Inoxidável Ltda

Barra da Tijuca - Endereço de Cobrança e Escritório
Edifício Office Park
Victor Civita, 66 , sala 413- Barra da Tijuca, Rio de Janeiro/RJ.
CEP  22.775-044
(21) 3535-5050
(21) 3535-5060 fax

Bonsucesso - Endereço de Entrega e Faturamento
Rua Manoel Segurado, 168 - Bonsucesso - RJ - CEP 21061-600

SÃO PAULO
Elinox Central de Aço Inoxidável Ltda
Av. Presidente Wilson, 5059 - Ipiranga, São Paulo/SP
CEP 04220-001
(11) 6165-1400
(11) 6165-1414 fax