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Translated and Published. Japanese Standards Association. UDC This Japanese Industrial Standard specifies the general rules of coating f i l m s applied on the metal substrate of automobile parts, hereinafter referred to as the "parts", in order to make them anticorrosive or ornamental.
However, this is not applicable to the coating f i l m s shown below. For instance, the inside of driver's room and baggage room. Table 1. Items of Quality Characteristics. Place to be Region to be applied applied. Interior Car inside Exterior A. Interior Car outside' Exterior - A. Remark: The items marked with O in t h e table are to be principally applied, and those marked with " A to be applied according to agreement between the parties concerned. The permissible extent of defectiveness shall be subject to agreement between the parties concerned,.
A s for corrosion, blister or peeling whose diameter is less than 2 m m , there shall not exist one o r more per cm2 of effective surface. The test time needed for quality judgment should be selected from among those specified in 4.
The test time needed quality judgment should be selected from among those specified in 4. In the cases of substrates, such as copper, copper alloy, aluminum, aluminum alloy or zinc alloy, all of them electroplated, at least 6 0 grid sections shall remain.
Table 2. Weather Resistance. Observation item Requirement. Soil None easily recognized. Migrated soil. Strain None conspicuous. Blister None. Peeling Cracking None easily recognized. Hardening No remarkable change Sof tenin g. The parts for test shall be taken from the completed products which are manufactured in accordance w i t h the prescribed painting specification.
In case there is difficulty for tests because of the heavy weight or large size of the part o r the complexity of its con- struction, a test piece can be used instead subject to agreement between the parties concerned. The test pieces shall be ones manufactured from the same material and according to the same painting specification as the part.
When it is difficult to use a test piece from the same material, however, one of other materials may be used subject to agreement between the parties concerned. The size of a test piece shail, principally, conform to JIS K The part or test piece that has already been used for tests other than those for appearance, specular gloss or glare resistance shall not used be again. Prior to tests, the parts or test pieces shall be dried for hardening and allowed to stand for duration of time as specified for each paint.
Among them the color may be examined, however, under the ordinary light source of D 65 in 4. The color also may be compared, as necessity arises, with the boundary sample agreed on between the parties concerned, at a distance of about 25 cm. When it is difficult to make a scratch mark because of finished product, it is permitted either to omit the scratch mark or to adopt on alternative method subject to agreement between the parties concerned.
The duration of test shall be selected from 24 h , 48 h , 96 h , h , h , h and h. TAble 3. Table 4. Test for Water Resistance. Distilled water or 40 2 2 24,48,96,, Test condition deionized water. Table 5. JIS K The parts to contact w i t h 2 3 8 oil constantly or frequently.
Table 6. Test for Gasoline Resistance. Temperature Test time Test liquid Remark division l h The parts to. Test for Acid Resistance. Temperature Test. Testing Method for Alkali Resistance Carry out the test under the 4. Table 8. Test for Alkali Resistance. In case use of a tester is impossible, it may be carried out according to the method shown in Figure. Fig, 1. In the case of the substrate electroplated with chromium, examine it as i t is after making a gMd.
The size of one section in the grid is 2 mm in the case of 50 u m o r more in film thickness, and 1 mm in the case of thinner than 50 u m. Remark: The cellophane adhesive tape shall always be of superior quality made by the same manufacturer because stable adhesive power is needed. Select WON-S o r WAN-1 S for the outside parts, and WOL-S , WAL- 1 S , or WAL-2 S for the inside parts, and check for the presence of blister, peeling, cracking, soil, migrated soil, stain, or chalking, change of specular gloss or color, and softening or hardening of coating f i l m , on the effective surface, Measure the change of specular gloss in accordance with 7.
Table 9. Test for Cycle-cracking Property. Test condition and test sequence each cycle I I. Il D Reference 1. Type of Coating Types of coatings used generally for auto- mobile coating together w i t h their general hardening temperature and characteristics are listed in the Reference Table 1.
Here the names of resins as principal ingredients are indicated to represent the coatings. Reference Table 1. Type of coatings Characteristics. This table shows the characteristics of the monolayer-coated films of various resin coatings whi I have the standard thickness and are prepared - - by the st'andard process. Among the symbols in the characteristics column, the mark I1ot1 means superior, lloll passable, I t a " barely passable and It X I 1 failure.
Reference 2. List for Evaluation of Appearance The technical terms often used when evaluating appearance and its general meaning are given in Reference Table 2. Reference Table 2. Terms General meaning Substrate exposure Substrate such as metal exposed by polishing of coating film o r the like. Blister Blisters appearing on coating film caused by the genera- tion or ingress of gas, vapor, or water in the lower layer after the coating containing water, volatile substance or solvent has been applied or after film has formed.
Peeling Partly peeling of coating film due to the decrement of adhesive power. Cracking Partly cut appearing on coating film because of senility of the film. Blushing ' Phenomenon of coating film turning white while it is drying. Flooding Because of the imbalance of pigment concentration between upper and lower layers while drying, a phenomenon that the coating color is thickened by the color of the pigment concentrated in the upper layer.
Dent Small dent appearing on the coating film soon after the painting, one of the defects of the film. Pin hole Small holes on the coating film recognizable by the naked eye. Crinklhg Wavy unevenness appearing on the coating film. Flow Phenomenon of generation of irregularities in the forms of semicircle, icicle, wave or the like when the coating layer applied on a vertical plane given side to unevenness in thickness as it flows downward while drying.
Bubble Bubbles formed inside the f i l m , most of which are formed when coating is being applied to stay. Soil Phenomenon that original color has been impaired because of mud , sand, oil, soot, asphalt, and so on adhering to the coating surface. Sump Accumulation of coating in the corners or the like which bring about thickness more than is necessary,. Stain S m a l l spots of the color different from that of the main part scattered over the coating surface,.
Mottle Unevenness of coating surface such as partly loss of luster, graduation of color, o r irregular pattern. Alien matter Small foreign particles not originally contained in dirt the coating. Bleeding Phenomenon that the proper color of upper layer changes owing to the migration of lower layer into upper layer when different color is overlaid on the lower film of coating.
Blobbin g Small projection generated on coating surface by alien matter or aggregate of pigment, I r r e gular color Partly unevenness of color on coating surface. Color Color of the light that reflects from or transmits through the layer of coating film.
Q Luster. Phenomenon perceived through an attribute of sense related to the quantity of light reflected specularly from the surface of an object.
Generally, the surface with a high percentage of specular reflection com- ponent of light is considered to be lustrous. Scratch Fine line on the coating surface caused by rubbing a film against other objects. Bruise I Crack or dented hollow caused an object striking against the coating film.
Reference 3, Surface Condition of Coating Film The surface condition of coating generally used on automobile parts is plain, but additionally, other surface conditions often used for ornament purposes are classified as shown in Reference Table 3. Reference Table 3. Glossy O 0- - I.
JIS D 0202
The JISC is composed of many nationwide committees and plays a vital role in standardizing activities across Japan. In the Meiji era , private enterprises were responsible for making standards, although the Japanese government too had standards and specification documents for procurement purposes for certain articles, such as munitions. These were summarized to form an official standard, the Japanese Engineering Standard , in The Japanese Industrial Standards Committee regulations were promulgated in , and new standards were formed. The Industrial Standardization Law was enacted in , which forms the legal foundation for the present Japanese Industrial Standards. Use of the old mark was allowed during a three-year transition period ending on September 30, , and every manufacturer was able to use the new JIS mark.
JIS D 0202-1988 (R 2006)(R 2011)
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