DETERMINING A STANDARDIZED PROCEDURE FOR EVALUATION OF AUTOMOTIVE RUSTPROOFING COMPOUNDS
AN INVESTIGATION WAS CONDUCTED TO FORMULATE A BASIS FOR A STANDARDIZED PROCEDURE FOR EVALUATION OF RUST-PROOOFING COMPOUNDS FOR CARS. THE TREATMENT OF INNER SECTIONS OF AUTOMOTIVE BODIES WITH ANTI-RUST COMPOUNDS IS A WELL- ESTABLISHED PROCEDURE TO DECREASE DANGEROUS INSIDE-OUT CORROSION. THE TECHNIQUE, REFERRED TO AS THE ML-METHOD HAS GAINED A WIDE ACCEPTANCE AND IS APPLIED TO USED CARS AS WELL AS NEW ONES. IN 1964, ABOUT 70 PERCENT OF ALL NEW CARS SOLD IN SWEDEN WERE TREATED ACCORDING TO THE ML-METHOD. THREE RUST-PROOFING COMPOUNDS FOR AUTOMOBILES WERE EVALUATED IN LABORATORY AND FIELD TESTS. LABORATORY EXPERIMENTS COMPRISED SALT FOG TESTS ACCORDING TO ASTM B117-64 AND IMMERSION IN SALT SOLUTION. THE THREE COMPOUNDS GAVE VERY DIFFERING RESULTS. ONE COMPOUND WHICH HAS A HIGH VISCOSITY AND A HIGH FILM WEIGHT SHOWED A GOOD PROTECTION AGAINST THE DIFFERENT CORROSIVE CONDITIONS DURING THE TEST PERIOD ON FREE SURFACES, BUT PROBABLY DUE TO LESS ABILITY TO FLOW INTO A NARROW CREVICE ON THE TEST PANEL, GAVE LESS PROTECTION IN WELDED SEAMS. THE OTHER TWO COMPOUNDS HAVE LOW VISCOSITIES AND LOW FILM WEIGHTS. THEY SHOWED LESS ABILITY TO PROTECT THE TEST PANELS AGAINST RUSTING. THE SAME COMPOUNDS WERE USED IN THE FIELD TESTS. THE COMPOUND WITH HIGH VISCOSITY AND HIGH FILM WEIGHT GAVE A GOOD PROTECTION DURING THE PERIOD OF THE TEST. THE OTHER COMPOUNDS FAILED TO PROTECT THE OUTSIDE OF THE TEST SPECIMENS SUBJECTED TO EROSION. THE LIMITED NUMBER OF COMPOUNDS TESTED DOES NOT ALLOW ANY STATEMENTS REGARDING THE CORRELATION BETWEEN THE FIELD TESTS AND THE ACCELERATED TESTS IN THE LABORATORY.
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Supplemental Notes:
- Vol 8, No 6, PP 43-44, 1 FIG, 1 TAB, 2 PHOT, 3 REF
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Authors:
- ULFVARSON, U
- JOHANSSON, K
- Publication Date: 1969-6
Media Info
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Serial:
- Materials Protection
- Publisher: National Association of Corrosion Engineers
Subject/Index Terms
- TRT Terms: Accelerated tests; Automobiles; Chemical compounds; Corrosion protection; Erosion control; Evaluation; Field tests; Film; Fog; Inhibitors (Chemistry); Motor vehicle bodies; Protective coatings; Rust prevention; Salt fog tests; Standardization; Viscosity; Weight
- Old TRIS Terms: Automobile bodies; Compounds
- Subject Areas: Geotechnology; Highways; Materials;
Filing Info
- Accession Number: 00216846
- Record Type: Publication
- Files: TRIS
- Created Date: Sep 2 1994 12:00AM