569641 A7 _______B7 五、發明説明（） 本發明所屬之技術領域 本發明，係有關於一種使用於各種電氣、電子器材之 具有良好耐蝕性的鐵系列構件之表面處理方法及經表面處 理之構件及其製造方法。特別是，有關於一種適合於在音 響器材上所使用之電氣音響轉換器用的構件及電氣音響轉 換器之製造者。 習知技藝 作為各種電氣、電子器材之一例，乃針對一種習知之 電氣音響轉換器的揚聲器，並以第5圖所示之截面圖作說 明。 第5圖所示之揚聲器，包含：磁路1，係由上部金屬板 la、磁鐵lb、及具有心柱之下部金屬板1〇所構成接著結合 在磁路1之框架2;振動板3,其外周經由邊緣部結合於上述 框架2，其内周結合於嵌入上述磁路丨之磁場間隙ld之聲音 線圈4,及’阻尼器5,其外周結合於上述框架2，内周結合 於上述聲音線圈4。 形成如上述構成之揚聲器的磁路1之上部金屬板u、下 部金屬板lc以及接著結合在磁路丨之框架2,乃由金屬材料 所形成。框架2、上部金屬板ia、下部金屬板lc，為防銹（防 姓）乃施予鍍鋅處理，並且，為提升防銹（防蝕）效果，更在 鑛鋅之上方再作絡表面處理。 近年來，於電器之小型高性能化之中，對於揚聲器亦 有小型化，高輸出化之趨向，並且，對於使用在揚聲器之 零件’亦要求提升耐熱性。另方面，在鑛鋅之上方再施予 4 本紙張尺度適用中國國家標準A4規袼（2】〇χ297公爱） 569641 五、發明説明（2 絡表面處理之習知的鐵系列構件之防钱技術上，具有··其 2屬之表面狀_非_定，並對使用接著劑之接合性有可能 會產生瑕疲之課題。其係在表面經處理之鉻電鑛皮膜本身 的接合性不良，且，鉻電鑛皮膜厚度有不均之故，因此， ^接合性亦會不均。又，亦具有鉻電職膜本身之耐熱性 欠佳的課題。例如，使絡電鍍皮膜長時間拋露在⑽。c之環 境中，則在鍍鋅面上會發生龜裂，乃對耐蝕性會產生障礙。 近年來，有提案以含有膠質狀二氧化矽、鈦化合物及 鈷化合物之處理液作處理<金屬材料的防錄處理液及處理 方法。如利用上述處理方法，即可獲得具有與鉻表面處理 同等之耐蝕性的金屬構件，為眾所周知。 經本發明人等之檢討結果，發現對於電氣音響轉換器 構件如進行上述表面處理，則不僅能提升耐钱性，並 可使構件之接合強度，耐熱強度提升，乃能製造可靠度（信 賴性）優良之電氣音響轉換器。 本發明之目的，係提供可解決前述習知之課題，同時， 具有優良之耐熱性，且接著強度良好之電器用零（構）件、 電軋音響轉換器用零（構）件，以及其製造方法。 本發明，係具有·以在表面設有鋅或鋅合金層之金屬 零件的表面所形成之膠質狀二氧化矽為主體的表面處理 層；以及，形成在前述表面處理層之表面的保護層之電器 用零（構）件。進而，其表面處理層之金屬成份更含有鋁、 鈦、鈷中的至少一種。依上述構成，就可提供具有優良耐 熱性、耐蝕性、接合強度之金屬製的電器用構件、電氣音 本紙張尺度適用中國國家標準（QyjS) A4規格（210X297公爱）569641 A7 _______B7 V. Description of the invention () The technical field to which the present invention belongs The present invention relates to a surface treatment method for iron series components with good corrosion resistance used in various electrical and electronic equipment, and surface-treated components and their Production method. In particular, the present invention relates to a component for an electric sound converter suitable for use in an audio equipment, and a manufacturer of the electric sound converter. Conventional technology As an example of various electrical and electronic equipment, a speaker of a conventional electric-acoustic converter is described with reference to the sectional view shown in FIG. 5. The speaker shown in FIG. 5 includes a magnetic circuit 1, which is composed of an upper metal plate 1a, a magnet 1b, and a lower metal plate 10 with a stem, and is then combined with a frame 2 of the magnetic circuit 1; a vibration plate 3, The outer periphery is coupled to the frame 2 via the edge portion, the inner periphery is coupled to the sound coil 4 and the 'damper 5' embedded in the magnetic field gap ld of the magnetic circuit, and the outer periphery is coupled to the frame 2 and the inner periphery is coupled to the sound Coil 4. The upper metal plate u, the lower metal plate lc, and the frame 2 which are then bonded to the magnetic circuit 1 forming the magnetic circuit 1 of the speaker configured as described above are formed of a metal material. The frame 2, the upper metal plate ia, and the lower metal plate lc are galvanized for anti-rust (anti-surname), and in order to improve the anti-rust (anti-corrosion) effect, surface treatment is performed on the zinc above the ore. In recent years, among the miniaturization and high performance of electrical appliances, there has been a trend toward miniaturization and high output of speakers, and the use of speaker components' has also been required to improve heat resistance. On the other hand, 4 paper sizes are applied on top of the mineral zinc. The Chinese paper standard A4 is applicable (2) 0 × 297 public love. 569641 V. Description of the invention (2) The anti-money of conventional iron series components with surface treatment Technically, it has the surface properties of the two genus _ not _ fixed, and may cause the problem of fatigue caused by the adhesiveness of the adhesive. It is because the surface of the chrome power mineral film itself has poor adhesiveness. In addition, the thickness of the chrome electric ore film is uneven, so the jointability will also be uneven. It also has the problem that the heat resistance of the chrome electric film itself is not good. For example, the electroplating film is thrown for a long time. When exposed to the environment of ， .c, cracks will occur on the galvanized surface, which will hinder the corrosion resistance. In recent years, proposals have been made to use colloidal silicon dioxide, titanium compounds, and cobalt compounds as a treatment solution. Treatment <Metal material-proof recording treatment liquid and treatment method. If the above treatment method is used, a metal member having corrosion resistance equivalent to chromium surface treatment can be obtained, which is well known. As a result of a review by the inventors, it was found that The surface treatment of the acoustic transducer component can not only improve the money resistance, but also increase the joint strength and heat resistance strength of the component, and can produce an electric acoustic transducer with excellent reliability (reliability). The present invention provides a zero (structural) component for an electrical appliance, a zero (structural) component for an electric rolling acoustic converter, and a manufacturing method thereof that can solve the aforementioned conventional problems and have excellent heat resistance and then good strength. A surface treatment layer mainly composed of colloidal silicon dioxide formed on the surface of a metal part provided with a zinc or zinc alloy layer on the surface; and a zero for electrical appliances formed with a protective layer formed on the surface of the surface treatment layer. (Structure). Furthermore, the metal component of the surface treatment layer further contains at least one of aluminum, titanium, and cobalt. According to the above structure, a metal electrical component having excellent heat resistance, corrosion resistance, and joint strength can be provided. The paper size of the electric sound book is applicable to the Chinese National Standard (QyjS) A4 specification (210X297 public love)
......攀.： (¾先閲讀背面之a意事^4¾、舄本K』 .、|叮丨 :線......- 569641 A7 —----l ____ 五、發明説明（}) 響轉換器用構件及其製造方法。 實施態樣 以下，針對本發明之一實施態樣，以音響轉換器之一 的揚聲器為例，依第1圖至第4圖作說明。在第！圖至第4圖 中，與習知技藝同一之部份，附加同一號碼，並省略其說 明。 第1圖係本發明之一實施態樣的上部金屬板之截面 圖。第2圖係表示本發明之表面處理的工程流程圖。第3圖 係將上部金屬板與磁鐵之接合強度在各保存環境下，本發 明與習知技藝作比較之說明圖。第4圖係於各耐熱條件之接 合強度與習知技藝作比較之說明圖。 本貫施態樣與習智技藝之相異點，係有關於金屬構件 之表面處理。以下，就針對本發明之表面處理有關之部份 作說明。 在第1圖中，在由鐵或其合金所構成之基座構件1}1的表 面施予鍍鋅le之上部金屬板la的表面，再形成表面處理層 1 f，以及在其上方更形成保護層1 g。 以下’以第2圖說明上述表面處理工程。 在第2圖所示之工程中，本發明至流程第1〇步驟鍍鋅後 之水洗工程為上，均與習知技藝相同。 在本發明中，經以膠質狀二氧化矽為主成份之無機系 列的表面處理層If之被著處理工程（表面處理）π，、乾燥工 程12’、保護層lg之形成工程（潤蝕加工處理）13,以及乾燥工 程14’後在鍍鋅le之上方進行表面處理，以替代習知之鉻電 本紙張尺度適用中國國家標準（CNS) A4規格（2】〇X297公釐） -6 -... Pan .: (¾Read the meaning of a on the back ^ 4¾, 舄 本 K 』., | Ding 丨: line ......- 569641 A7 —---- l ____ V. DESCRIPTION OF THE INVENTION (}) A component for a sound converter and a method for manufacturing the same. Implementation Example Hereinafter, according to one embodiment of the present invention, a speaker of one of the audio converters will be taken as an example and described with reference to FIGS. 1 to 4. In Figs. 4 to 4, the same parts as those in the conventional art are given the same numbers, and descriptions thereof are omitted. Fig. 1 is a cross-sectional view of an upper metal plate according to an embodiment of the present invention. Fig. 2 It is an engineering flowchart showing the surface treatment of the present invention. Fig. 3 is an explanatory diagram comparing the present invention with conventional techniques in the joint strength of the upper metal plate and the magnet in each storage environment. Fig. 4 is each heat resistant An explanatory diagram comparing the joint strength of the conditions with the conventional technique. The difference between the conventional method and the conventional technique is related to the surface treatment of metal components. The following is the part related to the surface treatment of the present invention. In Fig. 1, the surface of the base member 1} 1 made of iron or its alloy is applied. A surface treatment layer 1 f is formed on the surface of the upper metal plate 1 a above zinc le, and a protective layer 1 g is further formed thereon. The above-mentioned surface treatment process is described below with reference to FIG. 2. In the process shown in FIG. 2 In the present invention, the washing process after galvanizing in step 10 of the process is the same as the conventional technique. In the present invention, the surface treatment layer If of the colloidal silicon dioxide as the main component of the inorganic series surface treatment layer If is used. The surface treatment process (surface treatment) π, the drying process 12 ', the formation process of the protective layer 1g (etching process treatment) 13, and the drying process 14' are performed on the galvanized le to replace the conventional chromium The size of the paper is applicable to China National Standard (CNS) A4 (2) × 297 mm. -6-
、一-W (¾先閲讀背面之汶意事项再場韙本頁} 569641 A7 B7 五、發明説明（4 鍍處理。 以下，說明本發明之表面處理所使用之材料及其處理 方法。 表面處理1 Γ所使用之材料，係以膠質狀二氧化矽為主 成份並含有氧化鋁等之膠質狀氧化物的水分散液。在該分 散液，為更提升被覆物之耐蝕性之目的下，可添加鈦、鈷 等之異種金屬成份。該等金屬，如以金屬烷氧化物之形態 添加在水分散液，則成為金屬氧化物或水氧化物之膠質狀 粒子，且於分散液中，與表面之氫氧基反應，或者，吸著 於二氧化矽表面。又，該等之金屬若以金屬鹽、金屬鹹之 开> 怨添加時’則利用表面處理後之熱處理，最終將形成金 屬氧化物’並形成對基材具有優良密著性之皮膜。對於鈦 源’因四氣化鈦於空氣中將與水分反應而產生二氧化鈦， 是故’以使用穩定之硫酸鈦或者鈦烷氧化物為宜。而且， 因硫酸根於低溫較難飛散，因此，於事先在分散液中，使 膠質狀二氧化石夕與鈇坑氧化物作反應為宜。 膠質狀二氧化石夕，可使用，例如，由日產化學股份有 限公司所販售之商品名為SUNO-TEKUSU之產品等。其有 水分散型與醇分散型，惟，如考慮成本，膠質之穩定性， 使用水分散型膠質狀二氧化矽為宜。並且，為提升乾燥皮 膜之特性，亦能購買到在上述膠質二氧化矽中添加氧化鋁 之商品。 上述二氧化矽分散液，通常乃以使用鹽酸之酸性狀態 下作穩定化，惟，由於表面處理後之水洗與乾燥，鹽酸不 本紙張尺度適用中國國家標準（CNS) A4規格（210X297公楚） -----------------------裝------------------、可.............-........線. (請先閲讀背面之注意事項再填趑本頁) 569641 A7 ___B7_ 五、發明説明（5 ) 會飛散，對於金屬表面乃不會有不良影響。 於上述膠質狀分散液，可再添加乙烷基矽酸鹽，或者， 添加三甲基曱氧矽烷等反應性矽烷化合物，而與二氧化石夕 表面之氫氧基作反應，以圖提升皮膜特性。由於添加乙烧 基矽酸鹽，乃使所生成之皮膜的韌性增加，而可獲得被處 理物雖受到彎曲等之應力，亦無破損之表面處理層lf。又， 由於反應性矽烷化合物之添加，反應，即能增加處理液中 之固態成份濃度，因此，能使皮膜之韌性提升。 有關表面處理之方法，係將被處理物浸在上述處理 液，或對被處理物喷霧處理液之後，進行乾燥（熱處理）。 於乾燥之時，如果，過剩之處理液附著於被處理物，則表 面處理層1 f之表面會白化，而於白化之狀態下，很難獲得 耐腐蝕性，因此，要留意。對於過剩之處理液的去除，利 用離心力之旋轉處理方法較適合於量產。 乾燥溫度以80°c至250°c之範圍為佳。於低溫乃無法獲 得充分之皮膜特性，而於高溫乾燥之場合，由於冷卻上需 要較長之時間，乃使生產力降低。所獲得之表面處理層if 之耐蝕性，以乾燥溫度較高者為良好。又，替代上述高溫 處理，亦能添加硝酸於處理液，而進行氧化反應。 於形成表面處理層If之後，接著，進行潤飾完成加工 處理。在潤飾完成加工上所用之處理液，其基本上之組成 立與表面處理液同樣。在處理液添加硝酸，且在潤飾完成 加工處理之前，不進行乾燥工程，而立刻施予潤飾加工處 理亦可以。 财關緖準 _ _格（2K)X297公楚) ---- (請先閱讀背面之注意事項再填寫本頁)、 I-W (¾Read the items on the back of the page before you go to this page} 569641 A7 B7 V. Description of the invention (4 Plating treatment. In the following, the materials used in the surface treatment of the present invention and their treatment methods are described. Surface treatment 1 Γ The material used is an aqueous dispersion containing colloidal silica as the main component and containing colloidal oxides such as alumina. The dispersion can be used to improve the corrosion resistance of the coating. Add different metal components such as titanium, cobalt, etc. If these metals are added to the water dispersion as metal alkoxides, they will become colloidal particles of metal oxides or water oxides. Hydroxyl reaction, or adsorption on the surface of silicon dioxide. In addition, if these metals are added with metal salts and metal salts > when added, the heat treatment after surface treatment will be used, and eventually metal oxidation will be formed Material 'and form a film with excellent adhesion to the substrate. For the titanium source,' titanium tetraoxide will react with moisture in the air to generate titanium dioxide, so 'to use stable titanium sulfate or titanyloxy In addition, since sulfate is difficult to scatter at low temperature, it is advisable to react the colloidal dioxide and the pit oxide in the dispersion in advance. The colloidal dioxide can be used For example, products sold by Nissan Chemical Co., Ltd. under the trade name of SUNO-TEKUSU, etc. They are water-dispersed and alcohol-dispersed. However, considering cost and stability of colloid, use water-dispersed colloid. Silicon dioxide is suitable. In addition, in order to improve the characteristics of the dry film, you can also buy alumina added to the above colloidal silicon dioxide. The above silicon dioxide dispersion is usually stabilized in the acidic state using hydrochloric acid However, due to washing and drying after surface treatment, hydrochloric acid does not conform to the Chinese National Standard (CNS) A4 specification (210X297) for paper size ------------------ ----- install ------------------ 、 may be ............-........ line. (Please read the precautions on the back before filling out this page) 569641 A7 ___B7_ 5. Description of the invention (5) It will fly away and will not have adverse effects on the metal surface. For the qualitative dispersion, ethane silicate can be added, or reactive silane compounds such as trimethylphosphonium silane can be added to react with the hydroxyl groups on the surface of the dioxide to improve the film characteristics. The addition of ethoxylated silicate increases the toughness of the resulting film, and it is possible to obtain a surface treatment layer lf without damage even though the object to be treated is subjected to stress such as bending. Also, due to the addition of a reactive silane compound The reaction can increase the concentration of solid components in the treatment liquid, so that the toughness of the film can be improved. Regarding the method of surface treatment, the treatment object is immersed in the above treatment solution, or the treatment solution is sprayed with the treatment solution. , Drying (heat treatment). At the time of drying, if an excessive amount of the treatment liquid adheres to the object to be treated, the surface of the surface treatment layer 1 f will be whitened, and it is difficult to obtain corrosion resistance in the whitened state. Therefore, pay attention. For the removal of excess processing liquid, a rotary processing method using centrifugal force is more suitable for mass production. The drying temperature is preferably in the range of 80 ° c to 250 ° c. At low temperatures, sufficient film properties cannot be obtained, while in high-temperature drying applications, productivity is reduced due to the longer time required for cooling. The corrosion resistance of the obtained surface-treated layer if is better if the drying temperature is higher. Alternatively, instead of the high-temperature treatment described above, nitric acid can be added to the treatment liquid to perform an oxidation reaction. After the surface treatment layer If is formed, a finishing treatment is then performed. The basic composition of the treatment liquid used in the finishing process is the same as that of the surface treatment liquid. Nitric acid is added to the treatment solution, and the drying process is not performed before the finishing process is completed, and the finishing process may be applied immediately. Cai Guanxu Jun _ _ Grid (2K) X297 Gongchu) ---- (Please read the precautions on the back before filling this page)
丨·訂丨 569641丨 · Order 丨 569641
五、發明説明（a 本紙張尺度適用中國國家標準（CNS) A4規格（210X297公釐〉 在本實施態樣中，於表面處理乃使用UKEN工業股份 有限公司製商品名為METASUESC之產品，而於潤飾加工 處理，其處理劑即使用水溶性或水分散性之同METASU 99 〇 第3圖、第4圖係表示針對磁鐵lb與上部金屬板u之接 合強度（接合面積設定於約30 cm2)，比較本發明與習知技 藝者之結果。 在第3圖中， (1) 耐熱性，係在1〇〇。〇之環境中，放置240小時之後的 接合強度。 (2) 耐寒性，係在-4〇°c之環境中，放置24〇小時之後的 接合強度。 (3) 耐溫性，係在55cC、95%之環境中，放置5〇〇小時 之後的接合強度。 (4) 熱衝擊試驗，係以在·4〇^放置1小時之後立刻在μ C之環境中放置1小時之狀態，作為i循環，而實施1〇〇〇循 環之後的接合強度。 又，在第4圖中，耐熱性，係表示針對進行本實施態樣 之表面處理後的上部金屬板1 a，以及進行習知之表面處理 後之上部金屬板la與磁鐵lb作接合，且作加熱之後的接合 強度之變化。加熱條件，係分別放置在150°c之環境中1小 時，在200°C之環境中放置1小時，在250°C之環境中放置1 小時。在第4圖中，曲線a係表示本實施態樣之試料，而曲 線b係表示習知技藝之試料的接合強度。 9V. Description of the invention (a The paper size is in accordance with the Chinese National Standard (CNS) A4 specification (210X297 mm). In this embodiment, the surface treatment is using a product made by UKEN Industrial Co., Ltd. under the trade name METAUESC, and The finishing agent is treated with water-soluble or water-dispersible agents similar to METASU 99. Figures 3 and 4 show the bonding strength between the magnet lb and the upper metal plate u (the bonding area is set at about 30 cm2). Results of the present invention and those skilled in the art. In Fig. 3, (1) the heat resistance is based on the joint strength after being left for 240 hours in a 100% environment. (2) the cold resistance is based on- The bonding strength after standing for 24 hours in an environment of 40 ° C. (3) The temperature resistance is the bonding strength after standing for 5000 hours in an environment of 55cC and 95%. (4) Thermal shock test It is a state where it is left for 1 hour in the environment of μ C immediately after being left for 1 hour at · 40 ^, and it is regarded as the i-cycle, and the joint strength after the 100,000 cycle is performed. In addition, in FIG. 4, heat resistance Sex, which means that The upper metal plate 1a after the surface treatment, and the upper metal plate 1a and the magnet 1b after the conventional surface treatment are joined, and the joint strength after heating is changed. The heating conditions are respectively placed in an environment of 150 ° c. For 1 hour, place it at 200 ° C for 1 hour, and place it at 250 ° C for 1 hour. In Figure 4, curve a represents the sample of this embodiment, and curve b represents the conventional knowledge. Joining strength of craft samples 9
569641 A7 B7__ 五、發明説明（7 ) 由第3圖及第4圖之結果可知，以本實施態樣所獲得之 接合強度，於耐溫強度方面與習知技藝者相同，惟，其他 所有之特性均比習知者為優良。 進而，曾對以本實施態樣進行表面處理之上部金屬板 作鹽水喷霧試驗。試驗條件，係以將5。/❶Nacl溶液於35。〇 之環境中作8小時喷霧，且以16小時乾燥之工程作為1循 環，而視認視察3或6循環後之表面狀態。在鹽水噴霧試驗 中，於3循環後，習知技藝者與本實施態樣者並未發現有何 差異，惟，在6循環後，習知技藝者就發現有腐蝕，而判定 為不良。而在本實施態樣之試料，卻未發現有腐蝕。 又，在硫化風试驗（視認在H2s濃度5 ppm之環境中放置 1000小時後之表面狀態），本實施態樣者未發現腐蝕，惟， 習知技藝者於500小時就發現腐蝕，而判定為不良。 在上述說明，係針對電氣音響轉換器之磁路用金屬板 之表面處理作說明。但，本發明並不限定於上述實施例， 當然亦能適用於同樣作鍍鋅處理之金屬板與上部金屬板之 接合。並且，本發明對於具有腐蝕性之其他電氣音響轉換 器用構件，例如，鈥系列磁鐵等之處理亦有效。 如上述，有關本實施態樣的表面處理之構件，乃具有 對腐蝕有耐蝕性，且可靠度高，而對耐熱性優良之品質。 如此，依據本發明，即可提供高可靠度且高耐熱性之電氣， 電子器材用構件，電氣音響蝕換器用構件及其製造方法。 而於本實施態樣，潤飾加工處理劑方面乃使用膠質狀 二氧化矽之水溶性或水分散性的樹脂，惟，其以外，亦能 10 (請先閲讀背面之注意事項再填窝本頁) 本紙張尺度適用中國國家標準（CNS) A4規格（210X297公爱） 使用丙烯系列、㈣系列之水溶性或水分散性之樹脂。 又在上述貝施悲樣中，係以揚聲器為例說明本發明 於電氣音響轉換器用構件上具有優良之特性，以及其製造 方法但疋，鍍鋅或鍍鋅合金並非限定於揚聲器等之電氣 音響轉換器的用途，為當然之事。 即本發明在要求南接合強度，或者，在耐熱性或耐 環境性上有要求高可靠度之場所所使用之電子零件用構 件，或電子、電氣器材構件上，其用途十分廣泛。例如， 在電子器材之外殼'各種機構零件之構件等，本發明能有 效使用。 如上述，本發明係在以鐵系列材料為主體之構件表 面，形成耐蝕性優良之皮膜。由於形成該皮膜，乃使構件 之耐熱性亦提升。因此，特別適合作為有要求良好之耐輸 入功率的電氣音響轉換器，或者，有要求高耐腐蝕性之汽 車用電氣音響轉換器用構件。即，利用本發明之處理，乃 使構成磁路之磁鐵與金屬板之接合強度提升，而可獲得具 有優良品質之小型輕量的電氣音響轉換器。 圖式之簡單說明 第1圖係本發明之一實施例的揚聲器重要部份之上部 金屬板的截面圖。 第2圖係表示本發明之表面處理工程的流程圖。 第3圖係將本實施態樣之揚聲器的上部金屬板與磁鐵 之接合強度，與習知產品之接合強度作比較之比較圖。 第4圖係本發明與習知產品之耐熱性的比較圖。 A4規格（210X297公釐） 本紙張尺度適用中國國家標準（CNS) 569641 A7 B7 五、發明説明（9 第5圖係表示習知之揚聲器的構成之截面圖。 元件標號對照 1…磁路 la…上部金屬板 lb…磁鐵 lc…下部金屬板 Id…磁場間隙 1 e…鐘辞 1 f…表面處理層 lg…保護層 lh…基座構件 2…框架 3…振動板 4…聲音線圈 5…阻尼器 (請先閲讀背面之注意事項再填寫本頁) 12 本紙張尺度適用中國國家標準（CNS) A4規格（2】0X297公釐）569641 A7 B7__ 5. Description of the invention (7) From the results of Figures 3 and 4, it can be seen that the joint strength obtained in this embodiment is the same as the temperature resistance strength of the skilled artist, but all other The characteristics are better than those known. Furthermore, a salt spray test was performed on the upper metal plate subjected to the surface treatment in this embodiment. The test conditions are to 5. / ❶Nacl solution at 35. ○ spray for 8 hours in the environment, and use the 16-hour drying process as a cycle, and inspect the surface state after 3 or 6 cycles. In the salt water spray test, after 3 cycles, the skilled artist did not find any difference with this embodiment, but after 6 cycles, the skilled artist found corrosion and judged it to be defective. In the sample of this embodiment, no corrosion was found. Also, in the sulfidation wind test (the surface state after 1000 hours in an environment where the concentration of H2s is 5 ppm), no corrosion was found in this embodiment, but the skilled artisan found corrosion in 500 hours and judged As bad. In the above description, the surface treatment of the metal plate for the magnetic circuit of the electric-acoustic converter was explained. However, the present invention is not limited to the above-mentioned embodiment, and of course, it can also be applied to the joining of a metal plate and an upper metal plate which are also subjected to galvanizing treatment. In addition, the present invention is also effective for the treatment of other corrosive components for electric-acoustic transducers, for example, the series magnets. As described above, the surface-treated member of this embodiment has a quality that has corrosion resistance to corrosion, high reliability, and excellent heat resistance. As described above, according to the present invention, it is possible to provide a highly reliable and highly heat-resistant member for electric and electronic equipment, a member for electric acoustic converter, and a method for manufacturing the same. In this embodiment, colloidal silica is used as the water-soluble or water-dispersible resin for the finishing treatment agent. However, other than that, it can also be 10 (Please read the precautions on the back before filling the nest page) ) This paper size is in accordance with Chinese National Standard (CNS) A4 (210X297). Water-soluble or water-dispersible resins of acrylic series and rhenium series are used. Furthermore, in the above Bech's example, the speaker is used as an example to explain the excellent characteristics of the present invention on a component for an electric acoustic converter, and a method for manufacturing the same. The use of converters is a matter of course. That is, the present invention has a wide range of applications for electronic component components or electronic and electrical equipment components used in places where south joint strength is required, or where heat resistance or environmental resistance is required to have high reliability. For example, the present invention can be effectively used in the case of various electronic components such as components of various mechanical parts. As described above, the present invention forms a film having excellent corrosion resistance on the surface of a member mainly composed of an iron-based material. The formation of this film improves the heat resistance of the member. Therefore, it is particularly suitable as an electric-acoustic converter that requires good input power resistance, or a component for an electric-acoustic converter for automobiles that requires high corrosion resistance. That is, by using the processing of the present invention, the bonding strength between the magnet and the metal plate constituting the magnetic circuit is improved, and a small-sized and lightweight electric-acoustic converter having excellent quality can be obtained. Brief Description of the Drawings Fig. 1 is a cross-sectional view of an upper metal plate of an important part of a speaker according to an embodiment of the present invention. Fig. 2 is a flowchart showing a surface treatment process according to the present invention. Fig. 3 is a comparison chart comparing the bonding strength between the upper metal plate of the speaker and the magnet in this embodiment with the bonding strength of a conventional product. Fig. 4 is a comparison diagram of the heat resistance of the present invention and a conventional product. A4 size (210X297mm) This paper size applies Chinese National Standard (CNS) 569641 A7 B7 V. Description of invention (9 Figure 5 is a cross-sectional view showing the structure of a conventional speaker. Component number comparison 1 ... magnetic circuit la ... upper part Metal plate lb ... Magnet lc ... Lower metal plate Id ... Magnetic field gap 1 e ... Zhongci 1 f ... Surface treatment layer lg ... Protective layer lh ... Base member 2 ... Frame 3 ... Vibration plate 4 ... Sound coil 5 ... Damper ( (Please read the precautions on the back before filling out this page) 12 This paper size applies to China National Standard (CNS) A4 specifications (2) 0X297 mm