DOWNLOAD ARTICLE: INTRODUCTION TO TEMPORARY CORROSION PREVENTIVES
A brief summary of the factors affecting rusting behavior of your regular carbon or alloy steel parts:
Processing related factors
- Presence of other substances deposited on the material which could accelerate or inhibit rusting e.g. Metal fines, cutting fluids, heat-treatment/ quenching oils, salts, pickling smut, acids or bases
- Is a film existing from prior operations (scale from mill rolling, oil from machining etc.) to prevent permeation of Oxygen and water -and is it intact?
- Is there a significant difference in section thickness?
- Is the part or places on the part highly stressed? (Stress can help accelerate the reaction)
- Does a result of the process leave cracks crevices, or other similar features?
Environmental factors
- Solution in contact (presence and type)
- Hydrogen ion availability (pH) of the moisture
- Oxygen level
- Other ions species, their type and electro-activity
- Flow or exchange rate of solution (or stagnation)
- Degree of wetting
- Temperature / Humidity time of year
- Location: inside, controlled climate, or in transit
- Is their cyclic stress?
Finally, in the case where two or more dissimilar metals are in contact (Even welded) the electrochemical potentials of these being different will result in the most anodic (Active) (A= anode = active) will be corroded by the most noble (Noble= Not as reactive).
Poor Engineering Factor
- Dissimilar metals contacting. (Galvanic corrosion)
Steel related factors
- The electrode potential of the steel substrate
- Chemical composition - unless a self-healing film is generated by the
alloying additions,
more complicated chemistry means more likely to rust;
- Chemically non-homogeneous surface - (segregation)
- Physically non-homogenous surface - texture, pits and cracks and crevices
<span style="color: #E38700">RUST PREVENTIVES INDIA, RUST PROOF OIL, ANTI RUST OIL, RUSTOFF, Rust Preventatives, Corrosion Preventives, Chemicals, Tinab Products</span>
<span style="color: #E38700">RUST PREVENTIVES INDIA, RUST PROOF OIL, ANTI RUST OIL, RUSTOFF, Rust Preventatives, Corrosion Preventives, Chemicals, Tinab Products</span>